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Things May Be Bigger in Texas, but Not Necessarily More Convenient

by Benjamin Ediger, Ph.D. | Feb 16, 2023 | Patents

The US Court of Appeals for the Federal Circuit granted a mandamus petition after analyzing the Fifth Circuit’s public and private interest factors for transfer motions and ordered the US District Court for the Western District of Texas to transfer a case to the petitioner’s venue. In re Google LLC, Case No. 23-101 (Fed. Cir. Feb. 1, 2023) (Lourie, Taranto, Stark, JJ.).

Jawbone Innovations, LLC, had an eventful 2021:

February: Incorporated in Texas
May: Obtained ownership of nine patents (all directed to technologies behind the eponymous product line that liquidated in July 2017)
August: Rented office space in Waco, Texas
September: Asserted the nine patents it just acquired against Google in the Western District of Texas–Waco Division.

Google moved to transfer the dispute to the US District Court for the Northern District of California. That district was where (1) the accused products (earbuds, smartphones, speakers, displays and software) were researched, designed and developed; (2) the asserted technology was developed, and the asserted patents were prosecuted; and (3) the witnesses and sources of proof were primarily located. In contrast, no witnesses or sources of proof were located in the Western District of Texas. Moreover, Jawbone Innovations had no personnel in Waco nor activities related to the accused technology in the whole of Texas.

Judge Albright nevertheless denied Google’s transfer motion, weighing the Fifth Circuit’s four public interest factors and four private interest factors and finding that the transferee venue failed to meet the Fifth Circuit’s “clearly more convenient” standard. With the district court finding half of the eight factors not favoring either the transferee or the transferor, its holding boiled down to a ruling that considerations of “court congestion” and “judicial economy” (found to favor the transferor) outweighed considerations of “unwilling witness compulsion” and the “cost of attendance for willing witnesses” (found to favor the transferee).

Google petitioned the Federal Circuit for a writ of mandamus. The Court, applying the Fifth Circuit’s eight factor test, identified clear error in the district court’s analysis of five of the factors.

First: Addressing the “cost of attendance for willing witnesses” factor, the Federal Circuit found error in the district court’s conclusion that this factor only slightly favored transfer. Rather, the Court explained that this factor “weigh[ed] heavily in favor of transfer” because the transferee venue was clearly more convenient for potential witnesses, especially Google employees with technical, marketing and financial knowledge of the accused products. The error was localized to how the district court considered a Google declaration identifying at least 11 potential employee witnesses (all of whom were located in the transferee venue) and Jawbone Innovations’ assertions that the declaration omitted three potentially relevant Texas-based employees. The Court noted that while this 11 to three imbalance alone was sufficient to settle this factor, the district court’s error went further, finding Google’s declaration unreliable and less worthy of consideration because of the alleged omissions. The Federal Circuit determined this was error on error because the district court improperly ignored that the depositions [...]

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It’s PRUdent to Refrain from Cybersquatting: ACPA Applies to Domain Name Re-Registration

by Kavya Rallabhandi | Feb 9, 2023 | Technology, Trademarks

The US Court of Appeals for the Fourth Circuit joined the Third and Eleventh Circuits in ruling that the re-registration of an infringing domain name with a bad faith intent to profit violates the Anti-Cybersquatting Consumer Protection Act (ACPA). Prudential Ins. Co. of Am. v. Shenzhen Stone Network Info. Ltd., Case No. 21-1823 (4th Cir. Jan. 24, 2023) (Diaz, Thacker, Floyd, JJ.)

The ACPA, 15 U.S.C. § 1125(d), protects trademark owners from cybersquatters that register, traffic in, or use a domain name “identical or confusingly similar to or dilutive of” a distinctive or famous mark with the “bad faith intent to profit.” The ACPA jurisdictional requirement states that a trademark owner may either establish that a court has in personam jurisdiction over the defendant or, if personal jurisdiction cannot be established, bring an in rem action against the domain name.

Prudential Insurance Company of America’s trademark portfolio includes the term PRU and other PRU-formative marks. Shenzhen Stone Network Information (SSN) acquired the domain name PRU.COM from an online domain name marketplace, which leads to a parked page containing advertisements displaying Prudential’s trademarks and the marks of Prudential’s competitors. Prudential attempted to acquire the PRU.COM domain name twice—once through a domain name brokerage service and once after filing a Uniform Domain Name Dispute Resolution Policy (UDRP) administrative action with the World Intellectual Property Organization (WIPO). SSN rejected both offers. SSN claimed that it planned to develop the website into a foreign exchange and economic news platform, but it never substantively altered the parked page. Prudential subsequently dismissed the UDRP action and filed suit in the Eastern District of Virginia alleging cybersquatting and infringement against the CEO of SSN, Zhang (in personam), and PRU.COM (in rem). Zhang moved to dismiss the action or transfer it to the District of Arizona for lack of personal jurisdiction and in rem jurisdiction. The district court held that although it lacked personal jurisdiction over Zhang, in rem jurisdiction was appropriate at the time the complaint was filed. The district court then dismissed Prudential’s trademark infringement claim as moot, granted summary judgment to Prudential on its cybersquatting claim and ordered SSN to transfer the PRU.COM domain name. SSN timely appealed to the Fourth Circuit.

The Fourth Circuit, reviewing the district court ruling de novo, affirmed. As an initial matter, the Court held that the district court had proper in rem jurisdiction over the PRU.COM domain name because Zhang, as a corporate officer of SSN, lacked standing to defend SSN’s property interests and the domain name registry was located in Virginia. Moreover, in rem jurisdiction is assessed at the time the complaint is filed and cannot be destroyed during the pendency of the case if a proper defendant is later revealed.

Regarding the ACPA claim, SSN argued that since the initial domain name registrant registered PRU.COM in good faith, SSN, as a re-registrant, is not subject to the ACPA. The Fourth Circuit joined the Third and Eleventh Circuits in holding that the term “registration” in the ACPA is [...]

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KSR Does Not Extend to Design Patents (Yet)

by Courtney Seams | Feb 9, 2023 | Patents

Addressing the standard for obviousness of design patents, the US Court of Appeals for the Federal Circuit, in a per curiam opinion, upheld the Patent Trial & Appeal Board’s finding that a challenged design patent was not obvious over the pre-KSR design patent obviousness test or anticipated. LKQ Corporation v. GM Global Technology Operations, Case No. 21-2348 (Fed. Cir. Jan. 20, 2023) (per curiam) (Lourie, J., concurring) (Stark, J., concurring).

GM owns a design patent for the fender of a vehicle. LKQ Corp. previously held a license to the patent from GM, but negotiations to renew the license failed. Because LKQ continued to manufacture the fender after the expiration of the license, GM sent LKQ notice that it was infringing the patent. In response, LKQ petitioned for an inter partes review against GM, alleging that the patent was obvious and/or anticipated.

The Board found that LKQ had not presented enough evidence to prove that the patent was obvious or anticipated. For purposes of evaluating the obviousness of the design over prior art, the Board defined ordinary observers as “retail consumers who purchase replacement fenders and commercial replacement part buyers.” The Board concluded that, from the perspective of the ordinary observer, there were multiple differences between the patented design and the key reference, a prior art design patent. LKQ appealed.

LKQ argued that the Board erred in finding that there was no anticipation and in applying the obviousness tests of In re Rosen (C.C.P.A. 1982) and Durling v. Spectrum Furniture (Fed. Cir. 1996) because the Supreme Court of the United States overruled those tests in KSR International v. Telflex (2007).

The Federal Circuit upheld the Board’s definition of the ordinary observer. The Court found that retail purchasers of the entire vehicle would not be included in the ordinary observer group because purchasers of the product embodying the design are interested in the part itself, not the vehicle as a whole. The Court went on to uphold the Board’s application of the ordinary observer obviousness test, agreeing that the patented design created different overall impressions from the prior art for purposes of both obviousness and anticipation.

The Federal Circuit then addressed whether KSR overruled the Durling and Rosen tests for obviousness of design patents. The Court found that LKQ properly preserved the argument for appeal by asserting it in its opening brief to the Board. The Court then found that it was unclear whether the Supreme Court overruled Durling and Rosen, and therefore the Court was bound to apply the existing law. In applying the Durling and Rosen tests, the Court found that LKQ had failed to identify “the correct visual impression created by the patented design as a whole” because the prior art patent lacked certain key design features of the patented design. Thus, the Court affirmed the Board’s finding that the patent was not obvious.

Judge Lourie provided an additional opinion and addressed LKQ’s argument that KSR overruled Rosen. Lourie stated that because KSR did not involve design patents, which [...]

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Actual Confusion Is the Best Evidence of Confusion

by Ashley T. Brzezinski | Feb 9, 2023 | Trademarks

The US Court of Appeals for the Eighth Circuit reversed and vacated a district court’s preliminary injunction grant in a trademark dispute, concluding that potential confusion is insufficient to satisfy the burden of showing a substantial likelihood of confusion. H&R Block, Inc.; HRB Innovations, Inc. v. Block, Inc., Case Nos. 22-2075; -2023 (8th Cir. Jan. 24, 2023) (Gruender, Erickson, JJ.) (Melloy, J., dissenting).

H&R Block was founded in 1955 and specializes in income tax preparation and other tax and financial services. Over the years, H&R Block has invested billions of dollars in advertising campaigns and has developed significant market presence both in person and online. The company has also obtained several federal registrations directed to the use of a green square logo with its products and asserts that in addition to “H&R Block” it is known as just “Block.”

Square, Inc., is the company behind the Square payment card reader and point-of-sale software that allows individual sellers to accept credit card payments. Square was founded in 2009 and grew over time by acquiring or developing other businesses. Cash App is one of Square’s businesses. Cash App started in 2013 as Square Cash and is a purely digital platform that allows users to deposit and store money on the app. In November 2020, Square acquired free tax credit service Credit Karma Tax, which was rebranded as Cash App Taxes and integrated into the Cash App platform for the 2022 tax season. In December 2021, Square was renamed Block, Inc., and the name change was publicized via Twitter.

Fifteen days after the name change was announced, H&R Block filed suit alleging trademark infringement. Shortly thereafter, H&R Block moved for a preliminary injunction. The district court analyzed the marks at issue for likelihood of confusion and granted, in part, H&R Block’s request for a preliminary injunction. Block appealed.

The Eighth Circuit analyzed a list of six non-exclusive and non-exhaustive factors in assessing likelihood of confusion:

The strength of the owner’s mark
The similarity of the owner’s and the alleged infringer’s marks
The degree to which the products compete with each other
The alleged infringer’s intent to pass off its goods as those of the trademark owner
Incidents of actual confusion
The type of product, its cost and its conditions of purchase.

The Eighth Circuit agreed with the district court that H&R Block had demonstrated that its registered and common law marks were commercially strong but found that the record as a whole did not weigh in favor of H&R Block on the similarity factor because there were observable differences between the two logos and the competing products.

The Eighth Circuit indicated that ultimately the best evidence of likelihood of confusion is actual consumer confusion. While the record supported possible confusion by some consumers, the Court found that the district court had erred in finding actual consumer confusion and that H&R Block had not presented sufficient evidence to rise to the level of substantial confusion by an appreciable number of ordinary consumers. [...]

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Your Gang Did What!? No Matter—No Forfeiture of IP

by Kathleen Lynch | Jan 26, 2023 | Trademarks

In a unique case blending intellectual property and criminal law, the US Court of Appeals for the Ninth Circuit agreed that a district court properly exercised jurisdiction over a motorcycle club and upheld the lower court’s finding that the club did not have to forfeit its collective membership marks. United States v. Mongol Nation, Case Nos. 19-50176; -50190 (9th Cir. Jan. 6, 2023) (Ikuta, Forrest, Thomas, JJ.)

Mongol Nation is an unincorporated association comprised of Mongols Gang members and, per the district court, is “a violent, drug trafficking organization.” After a jury found Mongol Nation guilty of both substantive and conspiracy violations of the Racketeer Influenced and Corrupt Organizations (RICO) Act, the US government sought forfeiture of Mongol Nation’s rights in its collective membership marks—a category of “intellectual property used to designate membership in an association or other organization”—and specific property displaying those marks. A jury granted both forfeiture requests, but the district court granted forfeiture only of specific tangible property, not the marks themselves. The district court cited the First and Eighth Amendments: The First protected Mongol members’ rights to display their marks, and the Eighth prohibited the disproportionate remedy of forfeiture of marks that have “immense tangible” value to Mongol members. The government then filed another forfeiture application proposing that Mongol Nation forfeit its exclusive rights in the marks, meaning that Mongol Nation could not prevent others from using them, even in commerce, but that they would not transfer to or vest in the United States. The district court again denied this motion on First and Eighth Amendment grounds.

Both parties appealed, presenting two issues to the Ninth Circuit. Mongol Nation challenged the district court’s jurisdiction to hear the case because Mongol Nation is not a “person” under RICO. The government challenged the district court’s denial of forfeiture of the marks.

The Ninth Circuit summarily dealt with the first issue, noting that Mongol Nation did not properly raise this argument at the district court. The Court was not persuaded by Mongol Nation’s three-part argument that RICO defines an entity to be a “person” only if the entity has a legal interest in property, California only allows unincorporated associations to hold property if the association has a “lawful” purpose, and the indictment describes Mongol Nation as existing for an “unlawful purpose.” The Court found that the association misstated the indictment allegations, which said Mongol Nation’s purposes were “not limited to” the enumerated unlawful ones. Thus, because this argument was not properly preserved and because the RICO “person” definition did in fact encompass Mongol Nation, the Court found that the district court properly exercised jurisdiction.

The Ninth Circuit also affirmed the district court on the forfeiture issue, albeit for different reasons. Without reaching the district court’s First or Eighth Amendment logic, the Ninth Circuit stated that “RICO’s plain text” made the government’s forfeiture request “a legal impossibility.” The Court explained that, following a criminal conviction, a statute must enable property forfeiture. RICO does have such a penalty provision that encompasses [...]

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Bursting the Bubble on Prosecution Delays

by Christopher M. Bruno | Jan 26, 2023 | Patents

Addressing a case where a patent owner filed hundreds of applications as part of a strategy to maintain extraordinarily lengthy patent coverage, the US Court of Appeals for the Federal Circuit affirmed a district court’s determination that the patent owner had engaged in a calculated and unreasonable scheme to delay patent issuance. Personalized Media Comms., LLC v. Apple Inc., Case No. 21-2275 (Fed. Cir. Jan. 7, 2023) (Reyna, Chen, JJ.) (Stark, J., dissenting).

The Uruguay Round Agreements Act and General Agreement on Tariff and Trade (GATT) amended the US patent term to 20 years from the effective filing date, instead of 17 years from the issue date. GATT took effect on June 8, 1995. In the months leading up to GATT’s enactment, some would-be patentees seeded patent applications with tremendous disclosures to anchor future applications and obtain the longer pre-GATT term. Practitioners referred to this time period as the GATT bubble. Personalized Media Communications (PMC) submitted 328 GATT bubble applications, from which PMC sought somewhere between 6,000 and 20,000 patent claims. The term of these patents would be 17 years from their issue date instead of 20 years from their priority date.

PMC asserted that Apple’s FairPlay digital rights management software infringed a patent covering a decryption method and won a jury verdict of $330 million. After the verdict, the district court held a bench trial and ultimately found that the patent was unenforceable because of prosecution laches, a doctrine that bars the assertion of patents where the patentee caused unreasonable delay in obtaining the patent, to the detriment of the accused infringer. PMC appealed.

The Federal Circuit affirmed. First, it examined whether the district court had properly concluded that PMC unreasonably delayed. Based on a wide swath of record evidence, all three panel members—Judges Reyna, Chen and Stark—agreed that, like the patentee in Hyatt v. Hirschfeld, PMC had engaged in an intentional scheme to delay patent issuance and extend its monopoly. PMC tried to distinguish its case from Hyatt by arguing that it had developed, with the US Patent & Trademark Office, a consolidation procedure to prioritize review of certain applications. The Court concluded that the structure of the agreement still unreasonably drew out resolution of PMC’s applications, however. The Court also approved of the district court’s reasoning based on the number of applications filed and the introduction of new (albeit narrowing) elements to the claims 16 years after the priority date.

Turning to prejudice, the Federal Circuit concluded that the district court did not act improperly in determining that the delay and improper conduct continued to harm Apple up through the filing of suit in 2015. The Court found that the patent had issued based on a pending claim that PMC did not disclose during PMC-Apple license negotiations and which PMC could quickly get granted and assert against Apple.

Judge Stark dissented, stating that he would conclude that the prejudice Apple faced did not happen during the period in which PMC unreasonably delayed issuance. Judge [...]

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I Know That Brand . . . Or Do I? Reviewing the Eleventh Circuit’s Likelihood of Confusion Analysis

by Kavya Rallabhandi | Jan 26, 2023 | Trademarks

The US Court of Appeals for the Eleventh Circuit reversed and remanded a district court’s summary judgment ruling finding no likelihood that consumers might be confused as to any relationship between competitors operating in the same state, in similar trade channels and using a mark having the same primary word component. The Court held that a reasonable factfinder could determine that there was a likelihood of confusion between the parties’ marks as used in commerce. FCOA LLC v. Foremost Title & Escrow Services LLC, Case No. 19-13390 (11th Cir. Jan. 12, 2023) (Branch, Grant, Tjoflat, JJ.)

FCOA is an insurance company that has been selling and marketing insurance policies using FOREMOST marks since 1952. Foremost is a shell company selling title insurance on behalf of a law firm. Both parties operate in Florida. Seven months after Foremost started using its FOREMOST mark, FCOA sent Foremost a cease-and-desist letter. Foremost disputed the trademark infringement allegations and denied having any knowledge of FCOA or FCOA’s FOREMOST marks. The district court denied FCOA’s summary judgment motion and granted Foremost’s cross-motion for summary judgment, holding that FCOA failed to show a likelihood of confusion between the marks. FCOA appealed.

The Eleventh Circuit reviewed the district court decision de novo. Since there was no dispute that FCOA’s marks were valid, the Court focused its trademark infringement analysis on whether Foremost’s FOREMOST mark was likely to cause consumer confusion. It did so by analyzing its eight likelihood of confusion factors:

Actual confusion is the most important factor in the analysis. The Eleventh Circuit found no evidence that consumers actually confused the parties’ marks in the period between Foremost’s allegedly infringing acts and the lawsuit filing. Therefore, this factor weighed against a likelihood of confusion.
A mark’s strength/distinctiveness is the second most important factor because it analyzes the scope of the mark’s protection. The Eleventh Circuit found that FCOA’s FOREMOST mark was distinctive because, although the word mark in isolation is descriptive, it achieved secondary meaning through consumer recognition and commercial strength. The Court did not find Foremost’s list of likely inactive businesses using FOREMOST to be compelling rebuttal evidence. Therefore, this factor weighed in favor of a likelihood of confusion.
Similarity of the marks is relevant because the likelihood of confusion increases as the marks share more overall similarities. The Eleventh Circuit focused on the distinctive parts of the marks, noting that both logos feature FOREMOST prominently in bold, have two lines of text and are similarly centered and stylized. While there are differences in the logo fonts and colors, the Court determined that this factor still weighed in favor of confusion because consumers are unlikely to be discerning about these differences.

Similarity of the products that the marks represent is relevant in determining whether consumers think the marks originate from a single source. The Eleventh Circuit determined that [...]

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That Stings: Consent to Jurisdiction Must Be Effective at Filing to Invoke Fed. R. Civ. P. 4(k)(2)

by Joshua Revilla | Jan 19, 2023 | Patents

The US Court of Appeals for the Federal Circuit, on petition for writ of mandamus, vacated the district court’s transfer order and remanded the transfer to be considered under the clarified parameters of Fed. R. Civ. P. 4(k)(2) and 28 U.S.C. § 1404. In re: Stingray IP Solutions, LLC, Case No. 2023-102 (Fed. Cir. Jan. 9, 2023) (Lourie, Taranto, Stark, JJ.)

Stingray filed patent infringement suits in the US District Court for the Eastern District of Texas against TP-Link, a company headquartered and organized in China. TP-Link moved to transfer to the Central District of California (CDCA) under 28 U.S.C. § 1406 citing an alleged lack of personal jurisdiction that Rule 4(k)(2) did not cure because TP-Link would be amenable to suit in the CDCA. TP-Link also moved for transfer under 28 U.S.C. § 1404(a). The district court granted the motion to transfer under § 1406 based on the rationale that TP-Link was amenable to suit in the CDCA and relying on affirmative reservations made by TP-Link that the CDCA had proper jurisdiction and venue. The district court denied TP-Link’s § 1404(a) motion as moot following the transfer. Stingray filed a mandamus petition asking the Federal Circuit to determine whether TP-Link’s unilateral, post-suit consent to personal jurisdiction in another state defeated application of Rule (4)(k)(2).

The Federal Circuit first determined that mandamus review was appropriate in this case in order to resolve the question of whether a defendant can defeat personal jurisdiction under Rule 4(k)(2) by unilaterally consenting to suit in a different district, a jurisdictional question that has divided district courts. Some district courts have held that personal jurisdiction cannot be established under Rule 4(k)(2) if a defendant states that it is amenable to suit in another state, while others have concluded that defendants must do more than simply designate an alternative forum in order to avoid application of Rule 4(k)(2).

Rule 4(k)(2) was originally introduced to close a loophole where non-resident defendants without minimum contact with any individual state suitable to support jurisdiction, but with sufficient contacts with the United States as a whole, were able to escape jurisdiction in all 50 states. The rule essentially provided that under federal claims, serving a summons or filing a waiver of service could establish personal jurisdiction if the defendant was not subject to a state’s general jurisdiction and exercising jurisdiction would be consistent with the US Constitution and laws.

Here, the case focused on the “negation requirement” of Rule 4(k)(2) where the defendant is not subject to any jurisdiction of a state court. This case addressed the question of whether a defendant’s post-suit, unilateral consent to suit in another state prevents the requirement that a defendant is not subject to a state’s general jurisdiction from being satisfied.

The Federal Circuit determined that the “negation requirement” requires defendants to identify a forum where jurisdiction would have been proper at the time of filing, regardless of consent. The Court determined that therefore a defendant cannot use a “unilateral statement of consent” to [...]

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Absent Expressed Rationale of Obviousness, Federal Circuit Calls for Do-Over

by Anisa Noorassa | Jan 19, 2023 | Patents

The US Court of Appeals for the Federal Circuit reversed a ruling by the Patent Trial & Appeal Board (Board) where, on appeal, the US Patent & Trademark Office’s (PTO) rationale for sustaining the Board’s obviousness rejection did not reflect “the reasoning or findings the Board actually invoked.” In Re Google, LLC, Case No. 22-1012 (Fed. Cir. Jan. 9, 2023) (Moore, C.J., Lourie, Prost, JJ.)

Google’s patent application covers a method of filtering search results to display age-appropriate results using a “content rating score” in combination with a predetermined threshold value to determine which results will be presented. The application discloses several ways that the threshold value can be calculated, including using the length of the search query as a proxy for the age of the user, with longer queries being associated with older users and leading to a lower threshold score (allowing more mature content to be shown).

The application received a final rejection from the examiner, who asserted that the claims would have been obvious under 35 U.S.C. § 103 based on two prior art references, Parthasarathy and Rose. Parthasarathy disclosed a method to determine a content score to use for ranking results, while Rose disclosed a method to assign result importance based on query length. The examiner argued that it would be obvious to combine Rose and Parthasarathy to achieve the claimed method that recited a “predetermined threshold value” based on the number of words in a query. The examiner acknowledged that Parthasarathy did not disclose a threshold based on a number of words but found that Rose did, citing Rose’s modified relevance-ranking algorithm. He reasoned that it would have been obvious to combine Rose and Parthasarathy to achieve the claimed threshold because “analyzing a query for determining the query length and using the query length as a threshold is very well known in the art and doing so would further provide for assigning weight to a long or a short query for retrieving documents.” Google appealed the examiner’s decision to the Board, which affirmed the examiner’s rejection and adopted the examiner’s findings. Google appealed to the Federal Circuit.

On appeal, the PTO argued that because there were only two ways a person of ordinary skill in the art could modify Parthasarathy’s threshold to incorporate Rose, either of the modifications would have been obvious. However, the Federal Circuit found that this argument was not supported by the Board’s decision. The Court explained that while the Board did conclude that modifying Parthasarathy’s threshold to take into account the length of the query would have been obvious, the Board did not provide any detail as to how that would be achieved. In the absence of specific fact-based findings by the Board, the Court explained that it could not adopt the PTO’s argument, which rested on facts not found in the Board’s decision. A ruling relying on these facts would have resulted in a violation of basic administrative law principles since a court may only uphold an agency action on [...]

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Dictionaries Don’t Know Best: The Intrinsic Record Prevails (Again)

by Courtney Seams | Jan 19, 2023 | Patents

The US Court of Appeals for the Federal Circuit addressed the tension between the intrinsic and extrinsic record in claim construction, holding that the intrinsic record should be relied on first. The Court therefore reversed a district court finding of indefiniteness based on dictionary definitions and expert testimony. Grace Instrument Industries, LLC v. Chandler Instruments Company, LLC, Case Nos. 21-2370; -2370 (Fed. Cir. Jan. 12, 2023) (Chen, Cunningham, Stark, JJ.)

Grace owns a patent for a liquid pressurized viscometer used commonly to test the viscosity of drilling fluid that is used to drill oil wells. Grace’s viscometer uses an “enlarged chamber” between a lower chamber and a pressurization fluid inlet. According to the patent specification, this enlarged chamber was designed to reduce the measurement error in prior viscometer models that was caused by the mixing of sample fluid and pressurization fluid or by friction emanating from a seal in the viscometer. Within the lower chamber of the patented viscometer, there is a rotor having a “means for driving said rotor to rotate.”

Grace sued Chandler, claiming that Chandler infringed Grace’s viscometer patent. During claim construction, the district court found that the term “enlarged chamber” was indefinite, and that because it was a “term of degree,” it must be compared against something objective. The district court entered its final judgment in favor of Chandler. Grace appealed.

The Federal Circuit reversed, explaining that the “enlarged chamber[’s]” size did not need to be compared against any baseline object, but rather needed to be “large enough to accomplish a particular function.” The Court relied on the specification, which explained that the viscometer described in the patent reduced the mixing of sample fluid and pressurization fluid that was common in older viscometer models by using an “enlarged chamber.” The Court also cited the prosecution history, where the applicant explained that the invention solved a “long lasting problem” by reducing the measurement error caused by the friction of the seal or mixing of the fluids in older viscometer designs. Thus, the Court reasoned that a person of ordinary skill in the art would understand that the “enlarged chamber” must be large enough to prevent the mixing of the pressurization fluid and sample fluid to avoid the measurement errors associated with prior art viscometers.

Chandler argued that the term “enlarged chamber” was not a term of art. The Federal Circuit agreed but explained that “the intrinsic record sufficiently guides a skilled artisan as to the meaning of the term” as used in the patent. The Federal Circuit found that the district court erred in relying on a dictionary definition (extrinsic evidence) to contradict the meaning of the term found within the intrinsic record. The specification’s instructions for the meaning of a claim term should prevail over extrinsic evidence. Rebuffing Chandler’s argument, the Court explained that the specification does not need to explicitly define the claim term to govern the interpretation of that term.

The Federal Circuit remanded the case to the district court to reconsider indefiniteness in [...]

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