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Designated Informative: PTO Director Declines IPR Institution Following District Court § 101 Invalidation

The US Patent & Trademark Office (PTO) designated a recent Director Review decision as informative, signaling its significance for future proceedings. The decision emphasizes that a final district court ruling invalidating a patent weighs heavily against instituting inter partes review (IPR) under the Fintiv framework, reinforcing the agency’s stance on minimizing duplicative litigation. Hulu LLC v. Piranha Media Distribution LLC, IPR2024-01252; -01253 (PTAB Director Review Apr. 17, 2025) (Stewart, PTO Dir.)

Piranha requested Director Review of the Patent Trial & Appeal Board’s decision granting institution of two IPRs filed by Hulu. Piranha argued that the decision should be reversed and the IPRs denied institution, citing a district court final judgment invalidating the challenged claims under 35 U.S.C. § 101 issued before the institution decision was made. Hulu argued that Director Review was unwarranted.

In the district court litigation, Piranha asserted that Hulu infringed claims from two patents related to integration of advertising content into digital media streams. Hulu moved to dismiss the complaint, arguing that the asserted patents were ineligible for patenting under § 101. The district court determined that the asserted claims were directed to the abstract idea of “displaying an advertisement in exchange for access to copyrighted material, as well as the abstract idea of receiving, organizing, and displaying data,” and contained no inventive concept. The district court granted Hulu’s motion to dismiss and held the claims patent ineligible and therefore invalid under § 101.

The Director explained that since a district court had already ruled the patent claims invalid, launching separate IPRs to assess their patentability on other grounds was unnecessary. The Director noted that if the Federal Circuit overturned the district court’s decision, Hulu could still pursue its invalidity arguments during remand proceedings. Declining to institute review was the more efficient and practical path under the circumstances, the Director said.

While the Board applied the Fintiv framework in its institution decision, the Director observed that the framework does not align neatly with the facts of this case, where a final district court judgment under § 101 preceded the Board’s decision. The Director ultimately concluded that a second review proceeding was unwarranted given the claims’ current invalid status.




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Breaking New Grounds to Limits of IPR Estoppel

In a matter of first impression, the US Court of Appeals for the Federal Circuit found that inter partes review (IPR) estoppel does not preclude a petitioner from relying on the same patents and printed publications as evidence in asserting a ground that could not have been raised during the IPR proceeding, such as that the claimed invention was known or used by others, on sale, or in public use. Ingenico Inc. v. IOENGINE, LLC, Case No. 23-1367 (Fed. Cir. May 7, 2025) (Dyk, Prost, Hughes, JJ.)

IOENGINE owns patents directed to a portable device, such as a USB thumb drive, that includes a processor that causes communications to be sent to a network server in response to user interaction with an interface on a terminal. Ingenico filed a declaratory judgment action against IOENGINE after one of Ingenico’s customers was sued for infringement based on Ingenico’s products. Ingenico filed IPR petitions challenging the asserted patents, which resulted in final written decisions that held most of the challenged claims unpatentable.

Back at the district court, IOENGINE proceeded with the remaining claims. At summary judgment, IOENGINE moved, under 35 U.S.C. § 315(e)(2), to preclude Ingenico from relying on “documentation related to DiskOnKey Upgrade software,” arguing that Ingenico reasonably could have been expected to raise that prior art during the IPR proceedings. The district court ruled that “Ingenico will be estopped from relying on those documents [to prove invalidity] except to the extent . . . that they form part of a substantively different combination of references that could not reasonably have been raised in the IPRs.”

At trial, Ingenico introduced evidence of a prior art USB device known as the DiskOnKey. The DiskOnKey device was offered with various software applications, including an application called Firmware Upgrader, and was equipped with capabilities described in a Software Development Kit (together, the DiskOnKey system). Ingenico argued that the DiskOnKey system invalidated the asserted claims as anticipated or obvious because it was either “on sale” or “in public use” under 35 U.S.C. § 102(b), or “known or used by others . . . before the date of the invention” under 35 U.S.C. § 102(a). The jury returned a verdict finding the patents were infringed but invalid as anticipated and obvious. Both parties appealed.

IOENGINE did not dispute the jury’s finding that the DiskOnKey system invalidated the claims-at-issue as anticipated or obvious if the DiskOnKey system was prior art, but instead argued that the jury’s finding that the Firmware Upgrader portion of the DiskOnKey system was either “on sale” or “in public use,” or “known or used by others . . . before the invention.”

The Federal Circuit found that the jury’s finding that the Firmware Upgrader was accessible to the public was supported by substantial evidence. Specifically, Ingenico had introduced a press release promoting the launch of the Firmware Upgrader and a website from which the Firmware Upgrader was available for download. IOENGINE argued that this evidence did not show actual use, but the Court rejected [...]

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Collateral Estoppel Doesn’t Apply to Unchallenged IPR Claims

The US Court Appeals for the Federal Circuit found that despite a Patent Trial & Appeal Board determination that certain challenged patent claims were unpatentable based on a preponderance of the evidence standard, the patent owner is not collaterally estopped from asserting other, unreviewed claims of that patent in district court litigation. Kroy IP Holdings, LLC v. Groupon, Inc., Case No. 23-1359 (Fed. Cir. Feb. 10, 2025) (Prost, Reyna, Taranto JJ.)

Kroy sued Groupon for patent infringement. In response, Groupon filed two inter partes review (IPR) petitions challenging 21 claims of the patent at issue. After Groupon’s IPR deadline passed, Kroy amended its complaint to add additional claims from the challenged patent. The Board found all 21 challenged claims unpatentable. Kroy amended its complaint again, this time removing the 21 unpatentable claims and including only claims that were not at issue in the IPR proceedings.

In response, Groupon moved to dismiss the complaint, arguing that the Board’s prior IPR rulings on the unpatentable claims collaterally estopped Kroy from asserting the new claims. The district court agreed, finding that if the Board issues final judgment that a patent claim is unpatentable and another claim is immaterially different, then collateral estoppel applies to that other claim for purposes of invalidity. Applying that standard, the district court determined that the new claims were not materially different from the unpatentable claims in terms of invalidity and granted Groupon’s motion to dismiss with prejudice. Kroy appealed.

Kroy argued that collateral estoppel should not apply because the burden of proof for invalidity in an IPR proceeding (preponderance of the evidence) is lower than in the district court (clear and convincing). The Federal Circuit noted that this case presents a distinct question of collateral estoppel law; that is, whether a prior final written decision of the Board that certain patent claims are unpatentable precludes a patentee from asserting other claims from the same patent, even assuming the asserted claims are immaterially different from the unpatentable claims for purposes of invalidity.

Referring to its recent 2024 decision in ParkerVision v. Qualcomm, the Federal Circuit clarified that collateral estoppel does not apply to new claims that have not yet been adjudicated. The Court explained that Groupon must prove the invalidity of these new claims in the district court by clear and convincing evidence. The Court dismissed Groupon’s reliance on the 2013 Ohio Willow Wood decision, noting that this case addressed whether a prior district court’s invalidity ruling estopped the patentee from asserting claims in the district court that are immaterially different for purposes of invalidity. On the other hand, the Ohio Willow Wood estoppel scenario occurred in district courts involving the same burden of proof. Because the Board determined unpatentability on separate patent claims based on a preponderance of the evidence standard, courts cannot collaterally estop a patentee from asserting other, unadjudicated patent claims in district court litigation.




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A Lynk to the Past: Published Applications Are Prior Art as of Filing Date

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board decision finding challenged claims invalid based on a published patent application that, in an inter partes review (IPR) proceeding, was found to be prior art as of its filing date rather than its publication date. Lynk Labs, Inc. v. Samsung Electronics Co., Ltd., Case No. 23-2346 (Fed. Cir. Jan. 14, 2025) (Prost, Lourie, Stark, JJ.)

Samsung filed a petition for IPR challenging claims of a Lynk Labs patent. Samsung’s challenge relied on a patent application filed before the priority date of the challenged patent. However, the application was not published until after the priority date of the challenged patent. The Board rejected Lynk Labs’ argument that the application could not serve as prior art and determined the challenged claims to be unpatentable. Lynk Labs appealed to the Federal Circuit, raising three arguments.

Lynk Labs’ first argument was that the application could not serve as prior art because the publication date meant that it was not publicly available until after the priority date of the challenged patent. Pre-America Invents Act (AIA) law applied. Lynk Labs cited 35 U.S.C. § 311(b), restricting IPR petitioners to challenges “on the basis of prior art consisting of patents or printed publications.” While Lynk Labs admitted that the published application was a printed application, it denied that it was a prior art printed publication.

The Federal Circuit reviewed the issue de novo as a question of statutory interpretation. The Court noted that §§ 102(e)(1) and (2) carve out a different rule for published patent applications than the test for §§ 102(a) and (b) prior art. Under the statute, a patent application filed in the United States before an invention claimed in a later filed application qualifies as prior art if the application is published or a patent is granted on it.

Lynk Labs did not dispute that, under § 102(e)(2), an application resulting in an issued patent can be prior art, even if the patent is granted after an invention’s priority date, as long as the application is filed before the challenged invention priority date. However, Lynk Labs took issue with the fact that the Board applied the same principle, under § 102(e)(1), to applications that are published but do not become patents.

The Federal Circuit explained that the plain language of the statute permitted IPR challenges based on such applications and rejected Lynk Labs’ arguments that the statute should be interpreted differently. Lynk Labs argued that when Congress enacted § 311(b), it transplanted the term “printed publications” from case law, along with that case law’s “old soil” that established that the application would not be prior art.

In support of its argument, Lynk Labs cited case law that in its view suggested that patent applications are never prior art printed publications. However, the Federal Circuit distinguished those cases on the basis they were decided at a time before applications were published and therefore did not address published applications. Lynk [...]

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A Lesson in Judicial Principles: No Dismissal After Decision

The US Court of Appeals for the Federal Circuit denied a patent owner’s motion to voluntarily dismiss the appeal following the Federal Circuit’s decision to vacate and remand the case to the Patent Trial & Appeal Board but before the mandate issued. Cisco Sys., Inc. v. K.Mizra LLC, Case No. 22-2290 (Fed. Cir. Nov. 19, 2024) (Dyk, Reyna, Stoll, JJ.)

Computer networking companies Cisco, Forescout, and Hewlett Packard filed a petition for inter partes review (IPR) to challenge the patentability of several claims of a patent owned by K.Mizra. The Board found that the petitioners failed to show that the challenged claims were unpatentable. Cisco and Hewlett Packard appealed.

After full briefing and oral argument, the Federal Circuit issued an opinion vacating the Board’s decision and remanding with further instructions. Before the Court’s mandate issued, the parties reached a settlement and moved to voluntarily dismiss the appeal without submitting a request to vacate the Federal Circuit opinion. The motions were unopposed.

The Federal Circuit stayed the issuance of the mandate while it considered the motions and invited the US Patent & Trademark Office (PTO) to comment. The PTO requested that the Federal Circuit deny the motions because it had already entered its opinion and judgment and denied rehearing. The Court agreed, declining to depart from its principle that granting a motion to dismiss the appeal at such a late stage (days before the issuance of the mandate) would result in a modification or vacatur of its judgment that was neither required nor a proper use of the judicial system.

The Federal Circuit also emphasized that appeals from the Board require additional consideration in terms of the PTO Director’s unconditional right to intervene. The Court concluded with a reminder that the parties were free to seek dismissal from the Board on remand.




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

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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Blurred Vision: Appeal Dismissed for Lack of Standing

The US Court of Appeals for the Federal Circuit dismissed a patent challenger’s appeal in an inter partes review (IPR) because the challenger could not meet the injury-in-fact requirement for Article III standing. Platinum Optics Tech. Inc. v. Viavi Solutions Inc., Case No. 23-1227 (Fed. Cir. Aug. 16, 2024) (Moore, Taranto, JJ.; Checchi, Dist. J, sitting by designation).

Viavi Solutions owns a patent directed to optical filters that include layers of hydrogenated silicon and to sensor systems comprising such optical filters. Platinum Optics Technology (PTOT) petitioned for IPR. The Patent Trial & Appeal Board found that PTOT had failed to establish that the challenged claims were unpatentable. PTOT appealed.

The Federal Circuit dismissed the appeal, finding that PTOT did not have Article III standing. The Court explained that while Article III standing is not required to appear before an administrative agency (such as the US Patent & Trademark Office), such standing is required once a party seeks judicial review in an Article III federal court. PTOT argued it had standing because of potential infringement liability due to its continued distribution of a product previously accused of infringing the patent and its development of new models of the previously accused product. The Court rejected both arguments.

First, PTOT asserted that it suffered an injury in fact because there was a likelihood that Viavi would sue again. PTOT relied on a letter from Viavi stating that it did not believe PTOT could fulfill its supply agreements with noninfringing products. The Federal Circuit disagreed with PTOT’s assertion, concluding that mere speculation about the possibility of suit, without more, is insufficient to confer Article III standing. Moreover, the Court noted that Viavi’s letter was sent prior to the patent infringement suits, which were dismissed with prejudice. Thus, the Court found that PTOT had not established an injury in fact based on potential infringement liability due to its continued distribution of a previously accused product.

Second, PTOT asserted that it suffered an injury in fact based on its development of new models of the previously accused product. PTOT’s argument was supported by a declaration from a Deputy Director of Operation Management at PTOT and the same letter from Viavi threatening future suit. The Federal Circuit did not find the declaration testimony compelling. It explained that the declaration, which generally alleged that PTOT continued to develop new models of the previously accused product, did not identify any specific concrete plans for PTOT to develop a product that might implicate the patent. The declaration did not explain the particulars of these new models or how the models might relate to the patent. The Court found that the declaration was insufficient to establish that PTOT’s development activities created a substantial risk of infringement or were likely to cause Viavi to assert infringement. The Court noted that the letter from Viavi did not specifically address models in development or foreclose PTOT’s ability to develop a noninfringing product.

Thus, the Federal Circuit concluded that PTOT failed to establish an injury [...]

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Unified Front: No Forfeiture by Failing to Raise Argument in Request for Rehearing

Addressing forfeiture of issues on appeal and sufficiency of the asserted prior art, the US Court of Appeals for the Federal Circuit upheld a Patent Trial & Appeal Board obviousness finding, explaining that a party does not waive arguments on appeal by failing to include them in a request for rehearing. Voice Tech Corp. v. Unified Patents, LLC, Case No. 22-2163 (Fed. Cir. Aug. 1, 2024) (Lourie, Chen, Cunningham, JJ.)

Unified Patents petitioned for inter partes review (IPR) of a Voice Tech patent that purported to improve upon the prior art by allowing a single mobile device to access and control various native applications and functions on a computer. Unified alleged that the challenged claims were unpatentable as obvious over three prior art references. The Board agreed and found that all of the challenged claims were unpatentable. Voice Tech appealed.

Voice Tech argued that Unified’s petition failed to identify any disclosure in the prior art that taught the “mobile device interface” claim limitation in the challenged claims because Unified’s claim analysis failed to expressly mention a “mobile device interface.” The Board dismissed this argument, finding that Unified properly mapped its analysis of other patent claims to the “mobile device interface” claim recitation and presented a sufficient argument regarding obviousness. The Federal Circuit agreed that one of the prior art references taught a “mobile device interface.” The Court found that the Board did not rely on a new theory not found in the IPR petition, but instead had mapped the “mobile device interface” limitations to the prior art because the petition itself raised the theory.

Voice Tech also argued that the Board had failed to properly interpret certain claim terms. Unified countered that Voice Tech forfeited the claim construction arguments because they were not included in Voice Tech’s request for rehearing to the Board. The Federal Circuit disagreed, finding that a party’s choice to not re-raise an argument in a request for rehearing will not, by itself, forfeit the argument for review on appeal. The Court found that since Voice Tech had raised the claim construction arguments to the Board in its patent owner’s response, it had not forfeited those arguments on appeal.

The Federal Circuit also addressed Unified’s argument that Voice Tech’s proposed claim constructions would not change the outcome of the patentability analysis given the Board’s findings that the prior art disclosed the claim terms. The Court agreed with Unified, finding that it only needed to construe claim terms as necessary to resolve the controversy. The Court found that because Voice Tech’s responsive arguments were conclusory and failed to address how Voice Tech would be prejudiced by the Board’s adopted claim construction, the Federal Circuit did not need to consider Voice Tech’s claim construction arguments.

Finally, the Federal Circuit addressed Voice Tech’s arguments that the Board erred in finding that the prior art taught certain claim limitations and that Unified’s obviousness analysis was based on hindsight bias. The Court upheld the Board’s obviousness determinations as to all challenged claims, [...]

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PTAB MTA Pilot Program to the Rescue

On review of a final written decision from the Patent Trial & Appeal Board in an inter partes review (IPR), the US Court of Appeals for the Federal Circuit found that all challenged claims were obvious but left open the possibility of the patent owner amending the claims under the Motion to Amend (MTA) Pilot Program. ZyXEL Communications Corp. v. UNM Rainforest Innovations, Case Nos. 22-2220; -2250 (Fed. Cir. July 22, 2024) (Dyk, Prost, Stark, JJ.)

ZyXEL Communications petitioned for IPR challenging claims 1 – 4, 6, 7 and 8 of a patent owned by UNM Rainforest Innovation (UNMRI). The patent relates to methods for constructing frame structures in communication systems using orthogonal frequency-division multiple access (OFDMA) technologies. The patent describes a method for constructing a frame structure with two sections, each of which is configured for a different communication system, where the second communication system is used to support high mobility users (i.e., faster moving users).

Before the Board, ZyXEL argued that claims 1 – 4, 6 and 7 were unpatentable in light of two prior art references (Talukdar and Li), and that claim 8 was unpatentable in light of Talukdar and another prior art reference (Nystrom). During the Board proceedings, UNMRI filed a contingent motion to amend if any of the challenged claims were found to be unpatentable. As part of its motion, UNMRI requested preliminary guidance from the Board pursuant to the Board’s MTA Pilot Program. In its opposition to UNMRI’s motion to amend, ZyXEL argued that UNMRI’s amended claims lacked written description support, and in its preliminary guidance, the Board agreed. UNMRI attempted to file a revised motion to amend, but the Board rejected the revised motion and instead permitted UNMRI to file a reply in support of its original motion. It also allowed ZyXEL to file a sur-reply. The Board determined that claims 1 – 4, 6 and 7 were unpatentable, but that claim 8 was not. The Board also granted UNMRI’s motion to amend and determined that the new claims were nonobvious over the prior art of record. Both sides appealed.

With respect to the Board’s decision on the obviousness of claims 1 – 4, 6 and 7, the Federal Circuit found that substantial evidence supported the ruling. UNMRI’s primary argument was that a person of skill in the art (POSA) would not have been motivated to combine Talukdar and Li, but the Court credited the Board’s reliance on ZyXEL’s expert, who demonstrated sufficient motivation to combine the two references.

The Federal Circuit reversed the Board’s finding that claim 8 had not been shown to be obvious, however. The Court noted that while the Nystrom reference may not explicitly state the benefit of the missing limitations, “a prior art reference does not need to explicitly articulate or express why its teachings are beneficial so long as its teachings are beneficial and a POSA would recognize that their application was beneficial.”

Regarding UNMRI’s motion to amend, ZyXEL argued that the Board erred in granting the [...]

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From Oops to Encore: The Board’s Premature Adverse Judgment

The Director of the US Patent & Trademark Office (PTO) overturned the Patent Trial & Appeal Board’s premature adverse judgment against a patent owner and remanded an inter partes review (IPR) proceeding based on the fact that the patent owner had initially instructed its counsel to cease work on the IPR while seeking new representation for related district court litigation, which contributed to the procedural delays. Shenzhen Xinzexing E-commerce Co., Ltd. v. Shenzhen Carku Technology Co., Ltd., IPR2024-00222 (PTO-Ofc. of Dir. July 10, 2024) (Vidal, PTO Dir.)

Shenzhen Xinzexing E-commerce Co. filed a petition for an IPR to challenge certain claims of a patent owned by Shenzhen Carku Technology Co. (Patent Owner). The petition and associated documents for the IPR were properly served on the Patent Owner at the address of record. The Board issued a notice on November 29, 2023, allowing the Patent Owner three months to file a preliminary response and requiring mandatory notice information to be submitted within 21 days. The Patent Owner did not comply with either obligation.

Following the Patent Owner’s failure to submit the required notices and response, the Board issued a sua sponte adverse judgment on May 21, 2024, interpreting the lack of response as abandonment of the IPR contest. However, on July 8, 2024, the Patent Owner filed the necessary notices and appointed new counsel, indicating that the previous counsel had been instructed to withdraw from the case and that new representation was being arranged.

The Director sua sponte overturned the Board’s adverse judgment, finding that it was premature. The Board’s communications did not clearly indicate that noncompliance with the notice requirements would result in adverse judgment. Given that the Patent Owner had shown efforts to rectify the situation by appointing new counsel and filing the required documents, the director vacated the adverse judgment and remanded the case for the Board to determine whether the petition showed a reasonable likelihood that any of the challenged patent claims were unpatentable.

Practice Note: This decision highlights the necessity of adhering to procedural deadlines and ensuring that consequences for noncompliance are clearly communicated. The Board’s failure to provide explicit notice of abandonment of the contest contributed to the premature adverse judgment, reinforcing the importance of clear procedural guidance.




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