expert testimony Archives

expert testimony

Let’s Not Get It On: Battle of the Greatest Hits

by Kavya Rallabhandi | Nov 14, 2024 | Copyrights

The US Court of Appeals for the Second Circuit affirmed a district court ruling that Ed Sheeran’s 2014 hit “Thinking Out Loud” does not infringe the copyright on Marvin Gaye’s 1973 classic “Let’s Get It On.” Structured Asset Sales, LLC v. Sheeran, Case No. 23-905 (2d Cir. Nov. 1, 2024) (Calabresi, Parker, Park, JJ.)

In 1973, Ed Townsend and Marvin Gaye wrote the Motown hit “Let’s Get It On.” Townsend subsequently registered a copyright for the song’s melody, harmony, rhythm, and lyrics by sending the deposit copy of sheet music to the US Copyright Office. Townsend, Gaye, and Motown Records each held a one-third share in the copyright. Structured Asset Sales (SAS) purchases royalty interests from musical copyright holders, securitizes them, and sells the securities to other investors. SAS owns a one-ninth interest in the royalties from “Let’s Get It On.” Townsend’s remaining two-ninths share in the copyright is split between Kathryn Griffin, Helen McDonald, and the estate of Cherrigale Townsend.

In 2014 Ed Sheeran and Amy Wadge wrote the global chart-topper and Grammy-award-winning song “Thinking Out Loud.” In 2018, SAS brought a copyright infringement suit against Sheeran, Wadge, and various entities that produced, licensed, and distributed “Thinking Out Loud” (collectively, Sheeran). SAS alleged similarities in harmonies, drums, bass lines, tempos, and chord progression combined with anticipation (harmonic rhythm). SAS’s lawsuit followed the Griffin/McDonald/estate of Cherrigale Townsend’s 2017 lawsuit against Sheeran (Griffin lawsuit) alleging materially similar claims.

The district court determined that SAS’s infringement claim was limited to the scope of Townsend’s registration as reflected in the deposit copy (i.e., the sheet music) and excluded the sound recording of “Let’s Get It On.” As evidence that the songs were similar, SAS’s expert witness testified that the “Let’s Get It On” deposit copy included an inferred bass line that matched the bass line in Gaye’s sound recording of “Let’s Get It On” and the bass line in “Thinking Out Loud.” The district court rejected this testimony, concluding that “copyright law protects only that which is literally expressed, not that which might be inferred or possibly derived from what is expressed.”

The district court then denied Sheeran’s two motions for summary judgment without prejudice, determining that whether chord progression and harmonic rhythm in “Let’s Get It On” demonstrated sufficient originality and creativity to warrant copyright protection was a factual question to be determined at trial. Sheeran filed a motion for reconsideration. After the jury in the Griffin lawsuit found that Sheeran did not infringe the “Let’s Get It On” copyright, the district court granted Sheeran’s motion for reconsideration and concluded that “[t]here is no genuine issue of material fact as to whether defendants infringed the protected elements of [‘Let’s Get It On’]. The answer is that they did not.” SAS appealed.

SAS argued that the district court erred in limiting the evidence SAS could present to support its infringement claim and in granting summary judgment in favor of Sheeran. The Second Circuit rejected both arguments.

The Second Circuit explained that excluding the audio recording of “Let’s Get It On” was not error because the 1909 Copyright Act protects [...]

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A New Vision: Collateral Estoppel Doesn’t Extend to Related Claims

by Alexander P. Ott | Sep 19, 2024 | Patents

The US Court of Appeals for the Federal Circuit reversed a district court order excluding expert validity testimony based on collateral estoppel stemming from an inter partes review (IPR) proceeding of a related patent, finding that an unpatentability decision in an IPR does not collaterally estop a patentee from making validity arguments about related claims in a district court litigation. ParkerVision, Inc. v. Qualcomm Inc., Case Nos. 22-1755; 24-2221 (Fed. Cir. Sept. 6, 2024) (Lourie, Mayer, Stark, JJ.)

This case has a long and complicated history. In 2011, ParkerVision sued Qualcomm for alleged infringement of eight patents related to wireless communications technology. In October 2013, a jury returned verdicts rejecting Qualcomm’s invalidity defense, finding 11 claims across four patents to be infringed by Qualcomm, and awarded $172 million in damages to ParkerVision.

In June 2014, the district court granted Qualcomm’s motion for a judgment as a matter of law on noninfringement, which the Federal Circuit affirmed in late 2015. Meanwhile, ParkerVision filed a second case against Qualcomm in May 2014 alleging infringement of 11 more patents. That case was stayed in favor of a Section 337 investigation that ParkerVision filed against Qualcomm at the International Trade Commission.

Qualcomm then filed 10 petitions for IPR, six of which targeted one of ParkerVision’s patents. While the challenged apparatus claims of that patent were found unpatentable during the IPR, the challenged method claims survived. The district court statutory stay (during the Commission proceeding) was lifted in December 2018. Prior to trial, the district court granted Qualcomm’s Daubert motions seeking to exclude ParkerVision’s expert’s testimony on invalidity due to collateral estoppel arising from the IPRs, and the expert’s testimony on infringement for being unreliable. The district court granted Qualcomm’s motion for summary judgment of noninfringement based on its finding that the asserted claims were materially similar to the claims from the first case. ParkerVision appealed.

In July 2024, after the briefing was completed and the Federal Circuit held oral argument, the Court dismissed the appeal for lack of appellate jurisdiction and returned it to the district court because Qualcomm’s invalidity counterclaims had not been adjudicated. The parties then filed a joint motion at the district court seeking entry of a final judgment, which was granted in August 2024. ParkerVision appealed again.

The Federal Circuit reinstated ParkerVision’s initial appeal and reversed the district court’s determination. On the summary judgment of noninfringement, the Court rejected the collateral estoppel finding because the district court failed to conduct claim construction to determine whether the scope of the claims was the same as in the first case. As for the district court’s exclusion of expert validity testimony due to the IPRs, the Federal Circuit concluded that because of the different legal standards for proving invalidity (preponderance versus clear and convincing), a finding underlying an unpatentability decision in an IPR does not collaterally estop a patentee from making validity arguments regarding related claims in district court litigation.

Finally, the Federal Circuit concluded that the district court had abused its discretion [...]

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Smart Choice: Survey Design Didn’t Render Survey Unreliable

by Karen Gover | Jul 18, 2024 | Trademarks

Underscoring its faith in a jury’s competency to use its “common sense and experience” in evaluating evidence, the US Court of Appeals for the Ninth Circuit affirmed a district court’s judgment in favor of the defendants in a trademark infringement action following a trial, as well as its order partially denying the defendants’ motion for attorneys’ fees. BillFloat, Inc. v. Collins Cash, Inc., Case Nos. 23-15405; -15470 (9th Cir. July 1, 2024) (Thomas, McKeown, Christen, JJ.)

BillFloat and Collins Cash both provide financing to small businesses. In 2013, BillFloat began using SMARTBIZ as a trademark and registered the mark in 2014. That same year (2014), Collins Cash began using the mark SMART BUSINESS FUNDING, although it did not file an application to register the mark until 2020. Meanwhile, in 2018, BillFloat and Collins Cash entered into a partnership agreement under which Collins Cash would refer current and prospective customers to BillFloat in exchange for a referral fee. The parties’ agreement stated that “[i]f either Party employs attorneys to enforce any right arising out of or relating to this Agreement, the prevailing Party shall be entitled to recover reasonable attorneys’ fees.”

In 2020, upon learning of Collins Cash’s use of the SMART BUSINESS FUNDING mark, BillFloat brought claims for federal and state trademark infringement, breach of contract, unfair competition and unlawful business practices. The district court granted summary judgment to Collins Cash on the breach of contract claim and proceeded to trial on the trademark infringement claim.

Collins Cash engaged an expert to conduct a likelihood of confusion survey using the so-called “Squirt” methodology, which is used for lesser-known marks. BillFloat filed a motion to exclude the expert and his survey from trial, arguing that various errors made the survey unreliable and therefore inadmissible. The district court denied the motion and admitted the expert’s testimony and his survey. The district court also admitted testimony from BillFloat’s expert that challenged the survey. Both experts were cross-examined on their qualifications and on the merits of the survey.

The jury found that BillFloat had not established trademark infringement by a preponderance of the evidence. Post-trial, BillFloat moved for judgment as a matter of law and for a new trial, and Collins Cash moved for attorneys’ fees and non-taxable costs. The district court denied BillFloat’s motion and awarded Collins Cash attorneys’ fees under the partnership agreement for the breach of contract claim but declined to award Collins Cash attorneys’ fees for the trademark infringement claim or non-taxable costs for either claim. Both parties appealed.

BillFloat argued that the district court abused its discretion in admitting Collins Cash’s expert testimony and survey evidence. It also argued that the district court erred in declining to give BillFloat’s proposed jury instruction not to draw any inferences about the fact that BillFloat did not offer its own survey evidence.

The Ninth Circuit found no abuse of discretion on these issues. The Court pointed to the distinction between the admissibility of survey evidence as opposed to the relative weight a [...]

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The $X Factor: Demystifying Damages Calculations

by Keval Amin | Jun 13, 2024 | Patents

The US Court of Appeals for the Federal Circuit affirmed a district court’s decision to deny a defendant’s motion for a new trial on damages, finding that the plaintiff’s damages expert sufficiently showed that prior license agreements were economically comparable to a hypothetically negotiated agreement between the parties. EcoFactor, Inc. v. Google LLC, Case No. 23-1101 (Fed. Cir. June 3, 2024) (Reyna, Lourie, JJ.) (Prost, J., dissenting).

EcoFactor owns a patent directed to mitigating strain on the electricity grid by adjusting thermostat settings within HVAC systems. The patent describes a system where thermostats collect internal temperature readings and use them alongside external temperatures to estimate internal temperature change rates, including future predictions. EcoFactor sued Google alleging infringement based on Google’s Nest smart thermostat products.

After discovery, Google sought summary judgment, arguing that claims of EcoFactor’s patent were invalid as abstract ideas under 35 U.S.C. § 101. The district court denied this motion as well as Google’s Daubert motion to exclude the testimony of EcoFactor’s damages expert. At trial the jury found that Google infringed EcoFactor’s patent and awarded damages. The district court denied Google’s subsequent motions for judgment as a matter of law on noninfringement and for a new trial on damages. Google appealed.

Google raised three key issues. First, it argued that the district court erred in denying its motion for summary judgment. Second, Google asserted that the district court erred in denying its motion for judgment as a matter of law concerning the noninfringement of EcoFactor’s patent. Third, Google claimed that the district court wrongly denied its motion for a new trial on damages, arguing that EcoFactor’s damages expert opinion was based on unreliable methodology.

The Federal Circuit upheld the district court’s decision to deny summary judgment because there were genuine issues of material fact warranting a trial. The Court also affirmed the jury’s infringement verdict against Google, finding that it was supported by substantial evidence. Despite Google’s argument that its Nest thermostats did not meet the claims of EcoFactor’s patent, the Court concluded that expert testimony and corroborating documentation demonstrated otherwise.

On the damages issue, Google argued that EcoFactor’s expert testimony was unreliable because there was no evidence that the parties to the three license agreements used by the expert actually applied the royalty rate stated in the agreement. While Google acknowledged that each of the license agreements include a specified royalty rate, Google argued that each also included a “whereas” clause indicating that the licensee would pay EcoFactor a lump sum amount “set forth in this Agreement based on what EcoFactor believes is a reasonable royalty calculation of [$X] per-unit for . . . estimated past and [] projected future sales of products accused of infringement in the Litigation.” Google asserted that while the agreements may have included a stated rate, there was no evidence that the agreements actually applied the rate in calculating the lump sum payment.

The Federal Circuit rejected Google’s argument. The Court explained that the proposed royalty rate was derived from three [...]

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No Money, Mo’ Problems: Speculative Damages Award Cannot Stand

by Kathleen Lynch | Oct 26, 2023 | Patents

The US Court of Appeals for the Federal Circuit upheld a district court’s claim construction and jury instructions but reversed a premature judgment as a matter of law (JMOL) on obviousness and an imprecise damages award. Cyntec Company, Ltd. v. Chilisin Electronics. Corp., Case No. 22-1873 (Fed. Cir. Oct. 16, 2023) (Moore, Stoll, Cunningham, JJ)

Cyntec sued Chilisin for willful infringement of two patents related to molded chokes, which are component parts in batteries and power supplies. Four events at trial led to this appeal. First, the district court construed the disputed “by means of” term by its plain meaning but also instructed the jury that when a result occurs “by means of” a factor, that factor “has an impact on”—but may not be the “only potential cause” of—the result. Second, Chilisin presented invalidity evidence, arguing that the asserted claims were obvious by one prior art reference in light of another.

Before Chilisin could cross-examine Cyntec’s rebuttal expert, the district court granted Cyntec’s JMOL, finding the patents not obvious. In the third event that led to the appeal, Cyntec presented a market-share lost profits theory of damages based on expert testimony. Chilisin unsuccessfully moved to exclude the testimony as being speculative and unreliable. The jury awarded more than $1.8 million in damages and the district court subsequently granted enhanced damages totaling more than $5.5 million. As for the fourth event, Chilisin unsuccessfully moved for JMOL and a new trial on multiple issues. Chilisin then appealed.

The Federal Circuit reviewed three issues on appeal:

The nonobviousness JMOL
The infringement findings
The damages award.

Starting with nonobviousness, the Federal Circuit reversed the JMOL and remanded. While obviousness is ultimately a legal question, it relies on “numerous underlying factual findings,” including the scope/content/differences of prior art, the skill level of a person of ordinary skill in the art and objective indicia of nonobviousness such as commercial success. The Court found Chilisin had presented enough evidence to allow a jury to find the asserted claims obvious in light of the two prior art references presented. The Federal Circuit also analyzed the district court’s reasoning regarding the prior art and found that its “conclusions are either insufficient to support JMOL or unsupported by the evidence.” Thus, it was improper to withhold a partial fact issue from the jury.

Next, the Federal Circuit analyzed the infringement issue, dividing the analysis into the district court’s claim construction and jury instructions, and the jury’s infringement finding. Chilisin argued that the disputed term “by means of” should signal but-for causation, meaning the factor must cause the result. The Court agreed that this was one possible reading, but because the claim language did not read “by exclusive/primary means” or something similar, the disputed term could also encompass “mere contribution.” The Federal Circuit cited to the specification in support of its claim interpretation and ultimately upheld the district court’s claim construction and the consistent jury instructions. The Court rejected Chilisin’s argument that there was insufficient evidence of infringement, concluding [...]

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Bad Connection: Claim Construction Argument without Explanation Given No Weight

by Cecilia Choy, Ph.D. | Dec 22, 2022 | Patents

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board (Board) obviousness decision after finding that the patent owner failed to explain how its cited extrinsic evidence supported its proposed claim construction. Uniloc 2017 LLC v. Netflix, Inc., Case No. 21-2085 (Fed. Cir. Dec. 15, 2022) (Dyk, Taranto, Hughes, JJ.) (nonprecedential).

Uniloc owns a patent directed to a “more efficient” method for encoding videos by only coding at the pixel level when necessary and, where possible, reusing code for macroblocks in the background area. Netflix petitioned for inter partes review of several claims in Uniloc’s patent. The Board ultimately found the claims unpatentable as obvious. Uniloc appealed.

Uniloc argued that the Board erred in its claim construction of a limitation that required “dividing the stationary background region and the object region from an inputted video in a macroblock-by-macroblock basis by using a difference between the previous frame and the current frame.” The dispute before the Federal Circuit was whether the “macroblock-by-macroblock basis” required that the act of dividing be done macroblock-by-macroblock, as urged by Uniloc, or whether the dividing resulted in separate macroblock-based regions, as urged by Netflix and found by the Board. The Court concluded that Netflix and the Board were correct.

The Federal Circuit first addressed the intrinsic record, finding that it was ambiguous as to the meaning of “macroblock-by-macroblock basis.” Although the claim language supported either interpretation, Uniloc’s argument would require the Court to read language into the claim that was “simply not there.” The specification did not clarify the claim construction issue either. Although Uniloc pointed to one example where the dividing step occurred one macroblock at a time, the Court stated that it did not limit claim language to examples used in the specification. Lastly, the Court explained that the portions of the specification describing the purpose of the invention and avoiding problems in the prior art also failed to clarify the meaning of the macroblock-by-macroblock basis. Because the purpose was merely to make coding more efficient and avoid dividing at the pixel level, either interpretation could apply.

Relatedly, the Federal Circuit rejected Netflix’s argument that Uniloc forfeited the arguments on appeal related to the portions of the specification explaining the purpose of the claimed invention and how it purportedly solved problems in the prior art. The Court explained that the forfeiture doctrine does not “preclude a party from proffering additional or new supporting arguments, based on evidence record, for its claim construction.” Here, Uniloc “merely cited additional support in the specification to support the same argument it had always made” related to the macroblock-by-macroblock basis.

The Federal Circuit next addressed the extrinsic evidence and agreed with the Board’s decision that a “macroblock-by-macroblock basis” required dividing results in separate macroblock-based regions. Uniloc’s only extrinsic evidence was a dictionary definition of “basis,” and Uniloc offered no additional expert evidence to explain technological facts or usage in the field that would support its interpretation. In contrast, Netflix provided expert testimony and [...]

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Expert Testimony Excluded Based on Inadmissible Evidence

by Sarah J. Fischer | Jul 14, 2022 | Patents

Circuit Judge Bryson, sitting by designation in the US District Court for the District of Delaware, excluded a plaintiff’s damages expert opinion because the evidence relied upon by the expert was unreliable and therefore inadmissible, but permitted the plaintiff to serve short addendum opinions. IOENGINE, LLC v. PayPal Holdings, Inc., C.A. No. 18-452-WCB (D. Del. June 23, 2022) (Bryson, J.)

IOENGINE asserted two patents against PayPal and Ingenico in Delaware. Less than a month before the first trial, the district court struck essentially all of IOENGINE’s damages report, including testimony regarding a non-party license, two previous jury verdicts on a related patent involving different defendants and different products, and two settlements related to those jury verdicts. The order left IOENGINE with essentially no damages case to present at trial.

Two days after the order issued, IOENGINE requested a conference to discuss the damages issues and the parties engaged in letter briefing. IOENGINE asked the district court to reconsider its decision, arguing that the expert’s testimony was admissible under FRE 703, even if the underlying licenses, verdicts and settlement agreements were not admissible. Alternatively, IOENGINE requested the ability to serve short addendums to its technical and damages reports, or a bifurcation or adjournment of the trial date. PayPal and Ingenico argued that FRE 703 did not make the damages expert’s testimony admissible, and that any addendum or change in trial date would be highly prejudicial.

Judge Bryson ruled that FRE 703 did not permit IOENGINE’s damages expert to testify about otherwise inadmissible evidence. First, the district court looked to the Advisory Committee Notes for FRE 703. The notes explained that FRE 703 applied to situations such as a medical expert relying on hearsay statements by patients and their families and opinions by other medical professionals, because a medical expert would rely on that sort of information in diagnosing and treating a patient. Next, the court turned to a leading Third Circuit case holding that the reliability requirements of FRE 702 are equivalent to the requirements in FRE 703. The Third Circuit further held that the evidence on which an expert relies must meet a threshold requirement of reliability. Finally, the court cited another district court order that applied this standard. The order stated that the court was not judging the credibility of the expert witness, but rather whether the opinion was based on reliable data.

In balancing the parties’ various interests, Judge Bryson allowed IOENGINE to file addendums, but because these issues were of IOENGINE’s own creation, he attempted to find the solution that was most fair to PayPal and Ingenico. The court bifurcated the first trial, allowing the liability portion to go forward but holding the damages trial in abeyance. If IOENGINE prevailed on infringement and validity, a damages trial would be set. The second trial was adjourned until the first trial was resolved. The court gave IOENGINE one week to submit its short addendums (one to two pages for the technical expert and no more than 10 for the [...]

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Use of Negative Claim Construction is Unsound

by Art Dykhuis | May 19, 2022 | Patents

The US Court of Appeals for the Federal Circuit vacated a district court’s noninfringement decision that was based on a negative claim construction and remanded with instructions for the district court to determine what affirmative claim construction should be adopted. Sound View Innovations, LLC v. Hulu, LLC, Case No. 21-1998 (Fed. Cir. May 11, 2022) (Prost, Mayer, Taranto, JJ.)

Sound View owns a now-expired patent directed to streaming multimedia information over public networks. Sound View asserted the patent against Hulu based on Hulu’s use of a central content server that’s connected to end users through intermediate edge servers. The asserted claim recites downloading streaming content from a buffer in a helper server to an end user while concurrently retrieving more streaming content from a content server. During claim construction, the district court construed the downloading/retrieving limitation to require using the same buffer, as opposed to two different buffers.

With that claim construction in hand, Hulu sought summary judgment that, in the edge servers of its content delivery networks, no single buffer hosts both the video portion downloaded to the client and the retrieved additional portion. In response, Sound View argued that a factual dispute remained about whether “caches” in the edge servers met the concurrency limitation as construed. The district court held, however, that a “cache” cannot be a “buffer,” and on that basis granted summary judgment of noninfringement. The district court also excluded Sound View’s expert testimony on reasonable royalty damages. Sound View appealed.

The Federal Circuit first reviewed construction of the downloading/retrieving limitation, which was reviewed de novo since the district court relied on only the intrinsic evidence. The Court first analyzed the claim, noting that its wording “reasonably suggests allocating a single buffer” and did not suggest additional buffers. When reviewing the specification, the Court found that it was not inconsistent with reading the claims requiring that the same buffer be used for both downloading and retrieving and observed that it disclosed an embodiment with only one buffer. The Court also reviewed the prosecution history, noting that the applicants added the limitation at issue to distinguish prior art and specifically emphasized the “concurrent[]” limitation. Thus, the Court affirmed the district court’s construction of the downloading/receiving limitation.

Turning to the noninfringement finding, the Federal Circuit rejected the district court’s finding that a “cache” was a different, distinct physical component when compared to a “buffer.” In particular, the Court took issue with this interpretation because it was a negative construction, and the district court never provided an affirmative construction to be used in the infringement analysis. The Court also found that the intrinsic evidence did not support determining that “buffers” and “caches” were mutually exclusive. The Court thus reversed and remanded for the district court to determine an affirmative construction of “buffer.”

The Federal Circuit next addressed the district court’s decision to exclude evidence from Sound View’s expert on reasonable royalty damages. First, the Court determined that the expert could not rely on a study performed in Sydney, Australia [...]

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Game Reset: Extrinsic Evidence Can’t Limit Claim Scope Beyond Scope Based on Unambiguous Intrinsic Evidence

by McDermott Will & Emery | Apr 7, 2022 | Patents

The US Court of Appeals for the Federal Circuit reversed a district court’s grant of summary judgment of noninfringement after concluding that the district court erred by relying on expert testimony to construe a claim term in a manner not contemplated by the intrinsic evidence. Genuine Enabling Tech. LLC v. Nintendo Co., Ltd., et al., Case No. 20-2167 (Fed. Cir. Apr. 1, 2022) (Newman, Reyna, Stoll, JJ.)

Genuine owns a patent directed to a user interface device (UID) that, in the process of synchronizing and merging data streams into a combined data stream, directly receives microphone speech input and transmits speech output via a speaker. During prosecution, the inventor distinguished “slow varying” physiological response signals discussed in a prior art reference from the “signals containing audio or higher frequencies” in his invention, arguing that the latter posed a signal “collision” problem that his invention solved. In distinguishing the prior art, the inventor explained that his invention “describes, in its representative embodiments, how to combine the data from a UID (mouse) and from a high-frequency signal, via a framer, which is unique and novel.”

Genuine subsequently filed a lawsuit against Nintendo, accusing Nintendo’s Wii Remote, Wii Remote Plus, Nunchuk, WiiU GamePad, Switch Joy-Con Controller and Switch Pro Controller of infringing the patent. During claim construction, the parties asked the district court to construe the term “input signal.” Genuine proposed the construction of the disputed claim term to be “a signal having an audio or higher frequency,” whereas Nintendo proposed the narrower construction of “[a] signal containing audio or higher frequencies.” Relying on expert testimony, Nintendo also argued that the inventor “disclaimed signals that are 500 [Hz] or less . . . generated from positional change information, user selection information, physiological response information, and other slow-varying information.”

The district court found that the inventor’s arguments amounted to a disclaimer. Crediting Nintendo’s expert testimony, the district court construed “input signal” as “signals above 500 Hz and excluding signals generated from positional change information, user selection information, physiological response information, and other slow-varying information.” The district court subsequently granted summary judgment of noninfringement, finding that the accused controllers produced the types of slow-varying signals that the inventor had disclaimed during prosecution. Genuine appealed.

Genuine argued that the district court erred in construing “input signal” by improperly relying on extrinsic evidence and improperly finding that the inventor disclaimed certain claim scope during prosecution. The Federal Circuit agreed, reiterating that although extrinsic evidence can be helpful in claim construction, “the intrinsic record ‘must be considered and where clear must be followed,’” such that “where the patent documents are unambiguous, expert testimony regarding the meaning of a claim is entitled to no weight.” In this case, although the parties agreed that the inventor had disavowed claim scope during prosecution, there was a dispute as to the scope of the disclaimer beyond signals below the audio frequency spectrum.

The Federal Circuit explained that for a statement made during prosecution to qualify as a disavowal of claim scope, it [...]

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Nailed It: Expert Must at Least Meet Ordinary Skill Level to Testify from POSITA Perspective

by Alexander P. Ott | Jan 27, 2022 | Patents

Addressing a US International Trade Commission (ITC) decision finding a § 337 violation as to one patent but no violation as to four other patents, the US Court of Appeals for the Federal Circuit reiterated that a technical expert must at least meet the level of ordinary skill in the art of the asserted patents to testify from the perspective of a person of ordinary skill in the art (POSITA), whether for claim construction, validity or infringement. Kyocera Senco Indus. Tools Inc. v. ITC, Case Nos. 20-1046, -2050 (Fed. Cir. Jan. 21, 2022) (Moore, C.J.; Dyk, Cunningham, JJ.)

In 2017, Kyocera filed a complaint at the ITC seeking a § 337 investigation based on infringement allegations for six patents directed to battery-powered gas spring nail guns. The investigation was assigned to the Chief Administrative Law Judge (ALJ), who, in the context of a Markman order, adopted Koki Holdings America Ltd.’s uncontested level of skill in the art as including “experience in powered nailer design.” After claim construction, Kyocera dropped one patent from the investigation and went forward with infringement under the doctrine of equivalents as the sole basis for violation for four other patents.

Prior to the evidentiary hearing, Koki moved to exclude Kyocera’s expert’s testimony due to their admission during deposition that they did not have the experience in powered nailer design required by the adopted level of ordinary skill in the art. The Chief ALJ held that the Federal Circuit’s decision in AquaTex Indus. v. Techniche Sols. expressly required that Kyocera’s expert’s testimony be excluded as to infringement under the doctrine of equivalents but permitted the expert to testify as to literal infringement on one patent and on claim construction. After the evidentiary hearing, the Chief ALJ issued an initial determination that relied, in part, on Kyocera’s expert to find a particular element satisfied on the one remaining patent where literal infringement was asserted, but ultimately found no infringement due to other claim limitations. The Chief ALJ’s noninfringement decision as to the one remaining patent was then overturned on review by the full ITC, which found a § 337 violation and issued a limited exclusion order.

Kyocera appealed the Chief ALJ’s exclusion of its expert’s testimony on doctrine of equivalents, and Koki cross-appealed on the Chief ALJ’s decision to allow Kyocera’s expert to testify as to literal infringement and claim construction. The Federal Circuit reversed the ITC’s decision, holding that it was error to permit any infringement testimony from Kyocera’s expert and explaining that a witness must at least have ordinary skill in the art to offer testimony from the perspective of a skilled artisan for claim construction, validity or infringement, whether literal or under the doctrine of equivalents.

Alexander Ott was a member of Koki’s ITC trial team and the Federal Circuit appeal team in this case.

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