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Federal Circuit Has Jurisdiction over Constitutional Questions in AIA Appeals

by | Sep 2, 2020 | ,

Addressing for the first time whether a district court has jurisdiction to hear constitutional challenges to the Patent Trial and Appeal Board’s (Board) final written decisions in an inter partes review (IPR) proceeding, the US Court of Appeals for the Federal Circuit found that the Federal Circuit has jurisdiction over AIA appeals, including constitutional questions. Security People, Inc. v. Iancu, Case No. 2019-2118 (Fed. Cir. Aug. 20, 2020) (Hughes, J.).

Security People’s patent was challenged in an IPR, and the Board issued a final written decision invalidating all challenged claims. Security People appealed the Board’s decision to the Federal Circuit, which affirmed. The Supreme Court then denied Security People’s petition for certiorari. After the Supreme Court denied certiorari, Security People filed a lawsuit in the Northern District of California, challenging the Board’s final written decision as unconstitutional. The district court dismissed Security People’s claim because it lacked subject matter jurisdiction, citing the America Invents Act’s (AIA) provision giving the Federal Circuit jurisdiction over appeals from Board decisions in IPRs. Security People appealed.

Security People argued that because the Board lacks authority to consider constitutional claims, only a district court can hear factual issues underlying a constitutional challenge. Security People also argued that its constitutional challenge was not ripe until the Federal Circuit finally resolved the Board’s decision, and that it had to exhaust its claims on the merits before raising its constitutional claims.

The Federal Circuit disagreed. The Court found that in the rare instances where fact finding would be necessary for resolving a constitutional challenge, the Federal Circuit had authority to decide those factual issues through judicial notice. The Court explained that “finality” of the agency’s decision did not require the merits appeals to fully conclude before addressing constitutional issues, because the Board’s decision-making is complete when it issues a final written decision. In short, Security People was required to bring its constitutional challenge at the same time it challenged merits of the Board’s decision. The Court found its reasoning supported by the text, structure and history of the AIA, which gave the Federal Circuit wide authority to review Board decisions without any exception for constitutional challenges. The Court also reasoned that the Administrative Procedures Act’s (APA) general authorization to review agency action in the district courts does not override the specific framework in the AIA providing judicial review to the Federal Circuit. Indeed, there is no need to look to the APA’s general authorization in this regard, because the Federal Circuit is an adequate forum to resolve any issues challenged with respect to the Board’s final written decisions.



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Res Judicata on Procedural Grounds Precludes Similar Claims Arising After Prior Judgment

by | Sep 2, 2020 |

The US Court of Appeals for the Federal Circuit affirmed a district court decision that res judicata can apply to dismissals on procedural grounds and to claims arising after a prior judgment. Sowinski v. California Air Resources Board, Case No. 19-1558 (Fed. Cir. Aug. 21, 2020) (Newman, J.)

Richard Sowinski is the inventor of a patent directed to an “electronic method and apparatus for validating and trading consumer pollution-control tax credits.” In a first set of lawsuits starting in 2015, Sowinski sued the California Air Resources Board (CARB) in state court, alleging infringement by CARB’s Cap-and-Trade Program. CARB removed the case to district court and filed several motions to dismiss. The district court dismissed the complaint after Sowinski failed to respond to these motions before the deadline. The dismissal was upheld on appeal.

As part of a second round of lawsuits starting in 2018, Sowinski filed a complaint in federal court that was “substantially identical” to the 2015 case, except the 2018 complaint sought infringement damages arising after the 2015 case decision. CARB moved to dismiss, arguing that the claim was barred based on the doctrine of res judicata, which prevents a civil claim from being tried if it arises out of the “same transaction or common nucleus of operative facts” of a prior case where the merits were adjudicated. The district court agreed and granted CARB’s motion to dismiss. Sowinski appealed.

Sowinski argued that res judicata did not apply to his case because the prior suit was resolved on procedural grounds, not the merits of infringement, and because the current complaint sought infringement damages occurring after the conclusion of his last lawsuit. For res judicata on what Sowinski called a “technicality,” the Federal Circuit applied Ninth Circuit procedural law. Under Ninth Circuit law, preclusion applies when a prior suit involved the same claim as the later suit, reached a final judgment on the merits and involved identical parties. The Court also noted that for preclusion purposes, dismissal for failure to prosecute is an adjudication on the merits. Applying these factors, the Federal Circuit affirmed the district court’s decision, explaining that res judicata generally applies when “a patentee seeks to assert the same patent against the same party and the same subject matter.”

The Federal Circuit found that preclusion can also apply to claims arising after the prior judgment, explaining that one cannot challenge the repetition of an act in a subsequent suit if the act was judged not wrongful. The Court explained that preclusion applies when the accused products or methods are essentially the same. Here, CARB activity was held not to be infringing in the 2015 case because of Sowinski’s failure to respond, and Sowinski’s 2018 complaint described CARB’s ongoing activities as the same as those in the 2015 case. The Federal Circuit therefore affirmed the district court’s decision, explaining that Sowinski alleged no different conduct or acts against the same defendant.



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Standard Essentiality Is a Question for the Fact Finder

by | Aug 20, 2020 |

Affirming a jury verdict of infringement, the US Court of Appeals for the Federal Circuit concluded that the question of whether patent claims are essential to all implementations of an industry standard should be resolved by the trier of fact. Godo Kaisha IP Bridge 1 v. TCL Comm. Tech. Holdings Ltd., Case No. 19-2215 (Fed. Cir. Aug. 4, 2020) (O’Malley, J.).

IP Bridge owns patents that it contends are essential to the Long-Term Evolution (LTE) standard, and accused TCL of infringing the patents based on the sale of LTE-compliant mobile phones and tablets. Relying on the Federal Circuit’s 2010 decision in Fujitsu Ltd. v. Netgear Inc., IP Bridge presented evidence at trial that (1) the asserted claims are essential to mandatory sections of the LTE standard and (2) the accused products comply with the LTE standard. TCL did not present any evidence to counter that showing. The jury found that TCL was liable for infringement of the asserted claims and awarded damages. Following the verdict, TCL filed a motion for judgment as matter of law, contending that IP Bridge could not rely on the methodology approved in Fujitsu because Fujitsu only approved that methodology in circumstances where the patent owner asks the district court to assess essentiality in the context of construing the claims of the asserted patents. The district court rejected TCL’s argument and concluded that substantial evidence supported the jury’s verdict. TCL appealed.

The Federal Circuit affirmed the district court’s rulings but explained that it was writing to refute TCL’s contention that whether a patent is essential to a standard is a question of law to be resolved in the context of claim construction. TCL argued that while standard compliance may be used to prove infringement, a district court must make a threshold determination as part of claim construction that all implementations of a standard infringe the claims. TCL argued that since IP Bridge never asked the district court to conduct such an analysis, the question should not have gone to the jury. IP Bridge responded by arguing that whether a patent is essential to a standard is a classic fact issue and is in the province of the factfinder.

The Federal Circuit agreed with IP Bridge and found that TCL’s appeal rested on a misreading of Fujitsu. In Fujitsu, the Court noted that if a district court finds that the claims cover any device that practices a standard, then comparing the claims to that standard is the same as the traditional infringement analysis of comparing the claims to the accused product. The Court explained that the passing reference to claim construction is a recognition that the first step in any infringement analysis is claim construction; it is not a statement that the district court must determine whether the claim covers every implementation of the standard. The Court also explained that determining standard essentiality of patent claims during claim construction does not make sense from a practical perspective because essentiality is a question about whether the claim elements [...]

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Senator Tillis Urges USPTO to Adopt Patent Reform Proposals

by | Aug 18, 2020 |

On August 10, 2020, Senator Thom Tillis of North Carolina urged the Director of the United States Patent and Trademark Office (USPTO), Andrei Iancu, to adopt two patent reform proposals suggested by Lisa Larrimore Ouellete and Heidi Williams. Senator Tillis is the Chairman of the Senate Judiciary Committee’s Subcommittee on Intellectual Property. Stanford University professors Lisa Larrimore Ouellete and Heidi Williams proposed the reforms in a paper, Reforming the Patent System, The Hamilton Project, Policy Proposal 2020-12 (June 2020).

The first proposed reform would require patent applicants to more clearly distinguish between hypothetical experimental results and actual experimental results. The USPTO allows applicants to include so-called “prophetic examples” in a patent application. The patent applicant is supposed to distinguish between prophetic examples and actual working examples by the verb tense used to describe the example. Prophetic examples should be described in the present or future tense, while working examples should be described in the past tense. However, the verb tense is not always clear. Moreover, the verb tense distinction may not be appreciated by foreign language translators, scientists and engineers, especially in countries where prophetic examples are not allowed. Ouellette and Williams proposed that prophetic examples in patent applications be clearly labeled. This would reduce confusion by the public. Senator Tillis noted that confusing data in patent applications could be used to mislead the public and pump up profits for a company that has little to offer the economy or the public.

The second proposed reform would require patent owners to disclose ownership of patents in a more transparent and standardized manner. The lack of a transparent and standardized recording of patent assignments increases the costs and uncertainties of freedom-to-operate searches, licensing, negotiations and patent litigation. There is currently no requirement by the USPTO that the assignment records be updated when there is an ownership change of a patent. There is no requirement that hidden owners of patents be listed in an assignment record. Moreover, a single patent owner can be referred to by different names in different patents. Ouellette and Williams proposed: 1) Congress or the USPTO should require standardization of entity and inventor names across patent records, 2) Congress or the USPTO should increase incentives to record changes in patent assignments, and 3) at least for patents involved in litigation, parties having ownership interests in the patents should be identified.

Ouellette and Williams also proposed adjusting patent terms for pharmaceuticals so that pharmaceuticals that have to undergo a lengthy clinical trial would still have a sufficient patent term once they are approved by the Food and Drug Administration. However, patent term changes require a change to the patent statute, and therefore this proposal needs to be approved by Congress.

Senator Tillis explained that the two proposed reforms would enhance “the patent system so that it provides optimal incentives for innovators and inventors while also minimizing transactional costs that may discourage the development of new products.” Senator Tillis noted the two proposed reforms could be implemented by the USPTO [...]

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Challenge to PTAB’s Finding of Non-Obviousness Fails to Pay Out

by | Aug 13, 2020 | ,

Addressing whether the Patent Trial and Appeal Board (PTAB) ran afoul of the Administrative Procedure Act (APA) in finding that a dependent claim was valid despite the patent owner’s lack of validity arguments beyond those advanced for the corresponding and invalid independent claim, the US Court of Appeals for the Federal Circuit affirmed the PTAB’s ruling and found no APA violation. FanDuel, Inc. v. Interactive Games LLC, Case No. 19-1393 (Fed. Cir. July 29, 2020) (Hughes, J.) (Dyk, J. concurring in part and dissenting in part).

Interactive Games owns a patent directed to a method for allowing users to gamble remotely via a mobile device, according to certain game configurations. Specifically, the independent claim is directed to altering a user’s game outcome based on the gaming configuration associated with the location of a user’s mobile gaming device. A dependent claim adds the additional limitation of “accessing a lookup table which contains an ordered list of locations and associated game configurations.”

FanDuel petitioned for inter partes review (IPR) of the patent as obvious based on three references. The first reference (Carter) disclosed a mobile wagering system capable of determining a gambler’s location and restricting access based on the location. Carter’s system used a database that correlated various locations with applicable access levels. Importantly, the reference generally indicated that the system may employ various components such as “memory elements, processing elements, logic elements, look-up tables, and the like.” The second reference (Walker) disclosed enabling or disabling certain features on a mobile gaming device based on a user’s location. And the third reference (the webpage) included a list of slot payouts by casino, city and state, alphabetically organized by state. FanDuel also submitted an expert declaration that the use of look-up tables was well known in the art and that it would have been an obvious design choice to store Carter’s jurisdictional information in an “ordered list” similar to the webpage.

In its Preliminary Patent Owner Response, Interactive incorporated its validity arguments for the independent claim into its arguments for the dependent claim, but did not otherwise advance any substantive arguments specific to the dependent claim. The PTAB instituted IPR for all challenged claims. Following institution, Interactive submitted a patent owner response, which again did not advance any substantive arguments specific to the dependent claim. While Interactive did submit an expert declaration, the statements made by FanDuel’s expert specific to the dependent claim were uncontested. Ultimately, the PTAB found the independent claim invalid, but found the dependent claim valid. FanDuel appealed.

FanDuel argued that the PTAB’s decision with respect to the dependent claim violated the APA because the PTAB changed its obviousness theory midstream. FanDuel alleged that no further record development was presented regarding the dependent claim after institution, and therefore a finding of validity in light of the PTAB’s decision to institute amounted to a changed position by the PTAB, to which FanDuel was entitled notice and an opportunity to respond.

The Federal Circuit disagreed and affirmed the PTAB’s decision. In finding [...]

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Explain Yourself: “Untethered” Obviousness Determination Reversed

by | Aug 13, 2020 | ,

The US Court of Appeals for the Federal Circuit vacated in part and remanded a Patent Trial and Appeal Board (Board) determination of unpatentability because the Board did not adequately support its reasoning as to certain claims. Alacritech, Inc. v. Intel Corp., Case No. 19-1467 (Fed. Cir. July 31, 2020) (Stoll, J.).

Intel petitioned for inter parties review (IPR) of a patent owned by Alacritech that is directed to performing network processes on a dedicated network card (INIC) instead of on a computer’s central processing unit (CPU). Intel asserted that the claims would have been obvious over prior art Thia in view of Tanenbaum. The Board agreed, finding claims of the patent were obvious. Alacritech appealed.

Addressing the standard of review as set forth in the Administrative Procedure Act, the Federal Circuit explained that the Board is obligated to provide a record which shows the evidence on which its findings are based, as well as its reasoning in reaching its conclusions. While “perfect explanations” are not required, it must be sufficient for the Court to see that the agency has “done its job.” The Court found that the Board’s analysis as to three claims in the patent did not meet this standard.

The Court explained that the Board, after only briefly reciting the parties’ arguments, “merely concluded” that the relevant claim limitation was present in the subject claims and the prior art, and in so doing “misapprehend[ed] both the scope of the claims and the parties’ arguments.” The Court went on to explain that the crux of the dispute was where the claim limitation at issue took place—in the CPU (as in the prior art), or in the INIC (as required by the claims). The Court found that the Board’s analysis did not acknowledge this aspect of the parties’ dispute or explain how the prior art taught such a limitation. Without an explanation of its reasoning, the Court could not reasonably discern whether the Board followed the proper path in making its determination.

Intel argued that, while the Board did not itself expound on its reasoning, it did sufficiently support its position by citation to and adoption of Intel’s arguments. While the Federal Circuit noted that it has upheld Board determinations that flowed from the rejection or adoption of a party’s arguments, in this case the Board’s decision was “untethered from either party’s position.” Specifically, both parties focused their arguments on the Thia reference, while the Board relied on Tanenbaum to support its findings. Thus the Court was unable to infer the Board’s argument from those founded on a different basis.

The Federal Circuit also rejected as “fundamentally incorrect” Intel’s assertion that any evidentiary support in the record—even if not cited to by the Board—is sufficient to support the Board’s determination. The Court retorted that Intel’s sole citation to a footnote in a 2002 case was at odds with the clear precedent confining the Court’s review to the actual grounds on which the Board relied. Accordingly, the Court vacated the [...]

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Check Step One: It’s Not Ova until the Court Compares Claims

by | Aug 13, 2020 |

The US Court of Appeals for the Federal Circuit reversed a district court’s decision finding a patent directed to a method of sorting particles using flow cytometry technology ineligible under 35 U.S.C. § 101. The Federal Circuit also vacated the district court’s conclusion that the patent owner was precluded from asserting certain patents based on claim preclusion. XY, LLC v. Trans Ova Genetics, LC, Case No. 19-1789 (Fed. Cir. July 31, 2020) (Stoll, J.).

XY, Beckman Coulter and Inguran (collectively, XY) sued Trans Ova in 2016 for infringement of seven patents relating to technology for sex selection of non-human mammals. Trans Ova filed a motion for judgment on the pleadings, arguing that the asserted claims of one of the patents are ineligible under 35 U.S.C. § 101. Applying the Supreme Court’s two-step Alice framework for determining patent eligibility, the district court determined that the claims are ineligible under § 101. At Alice step one, the district court found that the patent’s sole independent claim was directed to the abstract idea of a “mathematical equation that permits rotating multi-dimensional data.” At Alice step two, the district court found that the asserted claims lacked an inventive concept because XY admitted that each claim element was known in the art.

Trans Ova also filed a motion to dismiss, arguing that the district court should hold XY’s infringement allegations barred by claim preclusion. The argument was based on XY’s 2012 lawsuit against Trans Ova on infringement of different patents directed to similar technology (which was pending on appeal when the 2016 case was filed). The district court granted Trans Ova’s motion to dismiss infringement allegations of three patents cited in the 2016 suit, and stayed proceedings on XY’s remaining causes of action pending the outcome of the 2016 suit’s appeal. XY appealed the district court’s dismissal decision.

On appeal, the Federal Circuit found that the district court erred in finding that the claims are directed to a mathematical equation under Alice step one. The Court concluded that the asserted claims are directed to a patent-eligible improvement of a method of sorting particles using flow cytometry technology, not to an abstract idea. XY’s claim described detailed improvements to a physical technique, a step-by-step method for a laboratory process, which is patent eligible.

As to the issue of claim preclusion, the parties’ only dispute was whether the district court properly concluded that XY’s 2012 and 2016 lawsuits present the same cause of action. A cause of action is defined based on the transactional facts from which it arises, which in a patent case include both the asserted patents and the accused activity. Claim preclusion will be triggered by different patents only if the scope of the asserted patent claims in the two suits is essentially the same.

XY argued that the district court erred by failing to compare the currently asserted patent claims to the previously asserted patent claims to determine whether the causes of action in the two lawsuits are essentially the same. The Federal Circuit [...]

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Unlikely to Succeed: Preliminary Injunction Denied Despite Stipulation to Irreparable Harm

by | Aug 13, 2020 |

In a dispute over the terms of a settlement agreement, the US Court of Appeals for the Federal Circuit found that a patent owner was not entitled to a preliminary injunction despite a stipulation that it would be irreparably harmed if the accused infringer breached certain provisions of the agreement. Takeda Pharmaceuticals U.S.A., Inc. v. Mylan Pharmaceuticals, Inc., Case Nos. 20-1407, -1417 (Fed. Cir. July 31, 2020).

Takeda originally sued Mylan to prevent Mylan’s launch of a generic version of Takeda’s branded drug Colcrys. The parties ultimately settled under terms set forth in a settlement/license agreement, including a provision in Section 1.2(d) stating that Mylan would be entitled to launch a generic product after a Final Court Decision holding that all unexpired claims of the licensed patents that were asserted and adjudicated against a third party were either (i) not infringed or (ii) any combination of not infringed and invalid or unenforceable. The licensed patents included 17 Orange-Book-listed patents that Takeda had asserted against Mylan. The parties further agreed that a breach of this provision “would cause Takeda irreparable harm.”

While Takeda and Mylan were negotiating the settlement, another patent litigation that involved some of the licensed patents was ongoing (the West-Ward litigation). The West-Ward litigation involved a different party and a different drug product. Takeda did not assert all 17 patents in the West-Ward litigation. It only asserted eight and ultimately dismissed five with prejudice. On summary judgment, the district court in the West-Ward litigation found that the asserted claims of the remaining three patents were not infringed.

Mylan informed Takeda that it would launch its generic product, arguing that summary judgment in the West-Ward litigation triggered Section 1.2(d), allowing it to launch its generic product because all of the asserted claims remaining in the suit had been found not infringed. In response, Takeda filed a complaint alleging breach of contract and patent infringement, and sought a preliminary injunction to enjoin Mylan from its launch. The preliminary injunction motion was denied. Takeda appealed.

A plaintiff seeking a preliminary injunction must show (i) that it is likely to succeed on the merits, (ii) that it will suffer irreparable harm in the absence of preliminary relief, (iii) that the balance of equities tips in its favor, and (iv) that an injunction is in the public interest. The Federal Circuit’s decision focused on the first two factors: likelihood of success and irreparable harm.

The Federal Circuit’s analysis of the likelihood of success prong turned on the meaning of Section 1.2(d). Takeda argued that Section 1.2(d) had not been triggered because not all unexpired claims that were asserted in the West-Ward litigation had been found not infringed, specifically the asserted claims of the five withdrawn patents. Mylan argued that triggering Section 1.2(d) only required that all unexpired claims that had been asserted and adjudicated to be found not infringed or invalid, and because the asserted claims of the five dismissed patents were not adjudicated, it was not necessary that the dismissed claims be [...]

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“Method of Preparation” Claims Still Patent Eligible Under § 101 in Modified Opinion

by | Aug 13, 2020 |

The US Court of Appeals for the Federal Circuit denied an accused infringer’s petition for rehearing en banc and issued a modified opinion with additional analysis maintaining its prior finding that patent claims directed to a method of preparation were patent eligible. Illumina, Inc. v. Ariosa Diagnostics, Inc., Case No. 19-1419 (Fed. Cir. Aug. 3, 2020) (Lourie, J.) (Reyna, J., dissenting).

In its original decision in Illumina v. Ariosa, the Federal Circuit found that claims directed to methods of preparing a fraction of cell-free DNA that is enriched in fetal DNA were not directed to a patent-ineligible natural phenomenon. In its modified opinion, the Court again concluded that the claims were patent eligible under § 101 because they were not directed to a natural phenomenon, but to an exploitation of that natural phenomenon, by inventing a method for preparing a mixture enriched in fetal DNA that selectively removed maternal DNA. In the modified opinion, the majority further explained that the claimed size thresholds were not dictated by any natural phenomenon, but were “human-engineered parameters that optimize the amount of maternal DNA that is removed from the mixture and the amount of fetal DNA that remains in the mixture in order to create an improved end product that is more useful for genetic testing than the original natural extracted blood sample.” The Court emphasized that the claimed methods achieve more than an observation or detection of a natural phenomenon because the claims include “physical process steps that change the composition of the mixture, resulting in a DNA fraction that is different from the naturally occurring fraction in the mother’s blood.” The Court distinguished Myriad by stating that the claims were ineligible in that case because they covered a gene that the inventors isolated but did not invent, whereas in this case, the inventors claimed an innovative method using human-engineered size parameters to perform the separation—not the separated DNA itself. The Court concluded that the claimed methods were patent eligible under § 101 because they “utilize the natural phenomenon that the inventors discovered by employing physical process steps and human-engineered size parameters to selectively remove larger fragments of cell-free DNA and thus enrich a mixture in cell-free fetal DNA.”

Judge Reyna again dissented, arguing that the claims were patent ineligible under § 101 because they were directed to an undisputed natural phenomenon (i.e., the “surprising” discovery of size discrepancy of cff-DNA in a mother’s blood), and the application of the natural phenomenon used routine steps and conventional procedures that are well known in the art. He explained that “[l]ike in Alice, the claims here are directed to a natural phenomenon because they involve a fundamental natural phenomenon, that cff-DNA tends to be shorter than cell-free maternal DNA in a mother’s blood, to produce a ‘mixture’ of naturally-occurring substances.” Judge Reyna argued that the majority ignored the Court’s “claimed advance precedent” by reasoning that the claims belong in a distinct category of “method of preparation” claims, but such characterization should be treated [...]

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Glass Half Empty: Patent Reciting “Half Liquid” Is Indefinite

by | Aug 13, 2020 |

The US Court of Appeals for the Federal Circuit affirmed the district court’s finding that the asserted patent claims were invalid as indefinite because the meaning of the term “half-liquid” was not reasonably clear from the record. IBSA Institut Biochimique, S.A. v. Teva Pharms. USA, Inc., Case No. 19-2400 (Fed. Cir. July 31, 2020) (Prost, C.J.).

IBSA owns a patent directed to pharmaceutical formulations for thyroid hormones that enable a safe and stable oral administration. IBSA listed in the Orange Book the patent for Tirosint®, a soft gel capsule formulation containing the active ingredient levothyroxine sodium. Teva filed an abbreviated new drug application to market a generic version of Tirosint®, and IBSA responded by filing a lawsuit for patent infringement against Teva.

During claim construction, the parties disputed the construction of the term “half-liquid.” IBSA proposed that “half-liquid” should be construed to mean “semi-liquid,” while Teva argued that the term was indefinite or should be construed as “a non-solid, non-paste, non-gel, non-slurry, non-gas substance.” The district court began its analysis by acknowledging that the parties “agree that the intrinsic record does not define ‘half-liquid.’” IBSA argued that a priority Italian patent application’s use of the word “semiliquido” (translation: semi-liquid) in the same places where “half-liquid” was used in the patent at issue supported its position that the two terms were synonyms. The district court disagreed, noting several differences in the two patents that indicated that the different choice of terms was intentional. Further, the district court noted that the applicant originally used the term “semi-liquid” in a dependent claim during prosecution, but later removed this term, indicating that the applicant understood the terms to be different and intentionally chose not to use “semi-liquid” in the asserted claims. The district court also found IBSA’s extrinsic evidence (e.g., reliance on dictionary definitions, other patents and expert testimony) unpersuasive. The district court accordingly found the asserted patent claims invalid as indefinite because the meaning of “half-liquid” was not reasonably ascertainable from the record. IBSA appealed.

The Federal Circuit affirmed. The Court first found that the intrinsic record failed to establish the boundaries of the term “half-liquid.” The Court agreed with the district court’s analysis, finding that neither the claims nor the specification supported IBSA’s proposed construction. The Court also explained that the prosecution history reinforced the conclusion that the applicant understood “half-liquid” to be different from “semi-liquid,” because the applicant intentionally removed the term “semi-liquid” in a dependent claim during prosecution. The Court disagreed with IBSA’s suggestion that the district court refused to consider the foreign Italian priority document—rather, “when discrepancies between a foreign priority document and the U.S. filing exist, it may be proper to view the discrepancies as intentional.”

Turning to the extrinsic record, the Federal Circuit found that the district court did not clearly err in its analysis of the presented dictionary definitions, other patents and expert testimony. The Court noted that IBSA identified no scientific dictionaries containing the term despite IBSA’s argument that “half-liquid” would be a recognizable term [...]

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