Inter Partes Review (IPR) Archives

Inter Partes Review (IPR)

A Lesson in Judicial Principles: No Dismissal After Decision

by Connor M. Larson | Dec 5, 2024 | Patents

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.

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

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

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

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

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

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

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

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

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

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Blurred Vision: Appeal Dismissed for Lack of Standing

by Lillian Spetrino | Aug 29, 2024 | Patents

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

by Courtney Seams | Aug 8, 2024 | Patents

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

by Thomas DaMario | Aug 1, 2024 | Patents

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

by Keval Amin | Jul 25, 2024 | Patents

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.

New Arguments Yield Same Unpatentability Outcome

by Karen Gover | Jun 13, 2024 | Patents

On remand from the US Court of Appeals for the Federal Circuit in connection with inter partes review (IPR) proceedings, the Patent Trial & Appeal Board considered the petitioner’s reply arguments and evidence regarding the claim constructions that were first proposed in the patent owner’s response but again found that the claims were not unpatentable. Axonics, Inc. v. Medtronic, Inc., IPR2020-00712; -00680 (May 30, 2024) (Tartal, Jeschke, Dougal, APJ)

Axonics filed IPR petitions challenging two patents owned by Medtronic that are directed to the transcutaneous charging of implanted medical devices. In its petitions, Axonics did not propose any express claim constructions. In its preliminary response, Medtronic agreed that claim construction was not necessary. In its patent owner response, however, Medtronic – for the first time – advanced a new claim construction that differed from the interpretation of the relevant claims implied in Axonics’s claim charts. Axonics defended its own implicit construction but also offered new arguments and evidence that the prior art anticipated the patents even under the alternative construction. The Board adopted Medtronic’s new claim construction but refused to consider Axonics’s new arguments and evidence because they were first presented in the reply. The Board then found that Axonics failed to show by a preponderance of the evidence that the challenged claims were unpatentable. Axonics appealed.

Axonics did not dispute the new claim construction first introduced by Medtronic in its response and adopted by the Board; it argued only that the Board erred in refusing to consider its reply arguments and evidence under the new construction. The Federal Circuit agreed, concluding that in such a situation, “a petitioner must be given the opportunity in its reply to argue and present evidence of anticipation or obviousness under the new construction, at least where it relies on the same embodiments for each invalidity ground as were relied on in the petition.” The Court remanded for the Board to consider Axonics’s new arguments.

On remand, the Board considered Axonics’s new arguments and evidence that the challenged claims were unpatentable over the prior art under the new construction. It also considered Medtronic’s amended sur-reply. The Board again determined that none of the challenged claims were unpatentable. In its analysis, the Board pointed out that some of Axonics’s new arguments and evidence regarding what the prior art disclosed in light of the new claim construction were inconsistent with the arguments and evidence it initially offered in its petition. In particular, the Board observed that the declaration testimony of Axonics’s expert regarding the prior art, on which Axonics relied in its petition, did not support the new claim construction, even considering the expert’s supplemental declaration. The Board also rejected Axonics’s attempts in its post-remand brief to discredit Medtronic’s arguments as “untimely and wrong,” “incorrect” and “contradictory of the positions on infringement it has taken in district court.” Citing the Federal Circuit, the Board pointed out that in an IPR, the burden of persuasion to prove unpatentability by a preponderance of the evidence [...]

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No Attorneys’ Fees Available for Successful IPR in Parallel Court Proceedings

by Lillian Spetrino | May 30, 2024 | Patents

The US Court of Appeals for the Federal Circuit concluded that a party that voluntarily elects to pursue parallel proceedings before the Patent Trial & Appeal Board and the district court is not entitled to recover attorneys’ fees under 35 U.S.C. § 285 (exceptional case doctrine) in connection with the Board proceedings, nor does § 285 entitle a party to hold opposing counsel jointly and severally liable for fees. Dragon Intellectual Property LLC v. Dish Network L.L.C., Case Nos. 2022-1621; -1777; -1622; -1779 (Fed. Cir. May 20, 2024) (Moore, C.J.; Stoll, J.) (Bencivengo, J., dissenting).

Dragon sued DISH Network, Sirius XM Radio (SXM) and eight others for patent infringement. The district court stayed proceedings as to DISH and SXM while they pursued inter partes review (IPR) but proceeded with claim construction for the other defendants. Following claim construction, all parties stipulated to noninfringement, and the district court accordingly entered a noninfringement judgment that was subsequently vacated following appeal to the Federal Circuit. Following the Board’s determination that the asserted claims were unpatentable, DISH and SXM filed a motion for attorneys’ fees in the district court proceeding. The district court granted the motion for time spent litigating the district court case but denied for fees incurred solely during the IPR proceedings and recovery from Dragon’s former counsel. DISH and SXM appealed the denial-in-part, and Dragon cross-appealed the grant-in-part.

The Federal Circuit affirmed the district court’s grant-in-part, finding that the district court did not abuse its discretion in declaring these cases exceptional. The Federal Circuit explained that the vacated noninfringement judgment did not require the district court to ignore its claim construction order in determining exceptionality. The Court further explained that even though Dragon was not entitled to a claim construction “do-over,” the prosecution history disclaimer issue was independently considered during the exceptionality inquiry, and Dragon did not provide any grounds for the conclusion that this constituted an inadequate inquiry.

The Federal Circuit also affirmed the denial of attorneys’ fees with regard to fees incurred during the IPR proceedings and Dragon’s former counsel’s liability for fee awards under § 285.

First, the Federal Circuit rejected DISH and SXM’s argument that § 285 allows recovery of fees incurred during parallel IPR proceedings, principally on the grounds that the IPR proceedings were pursued voluntarily. The Court reasoned that there are many advantages to leveraging IPR proceedings and, therefore, “where a party voluntarily elects to pursue an invalidity challenge through IPR proceedings, we see no basis for awarding IPR fees under § 285.”

Second, the Federal Circuit relied on the statutory text and determined that liability for attorneys’ fees awarded under § 285 does not extend to a party’s counsel. The Court explained that while other statutes explicitly allow parties to recover costs and fees from counsel, § 285 is silent as to who can be liable for a fee award, and therefore it is reasonable to conclude that fees cannot be assessed against counsel.

Sitting by designation, Judge Bencivengo of the US District Court for the Southern District of California dissented [...]

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How Close Are They? PTO Looking for “Significant Relationship” Between Sequential IPR Petitioners

by Sydney E. McDermott | May 9, 2024 | Patents

Addressing the issue of whether to discretionally deny a petition for inter partes review (IPR) under the General Plastics factors when there is no “significant relationship” between the petitioners, the Director of the US Patent & Trademark Office (PTO) vacated the Patent Trial & Appeal Board’s decision denying institution. Videndum Prod. Sol., Inc. v. Rotolight Ltd., IPR2023-01218 (PTO-Ofc. of Dir., Apr. 19, 2024) (Vidal, PTO Dir.)

Videndum filed a petition requesting IPR challenging claims of a patent owned by Rotolight. In its Patent Owner’s Response, Rotolight argued to the Board that it should exercise its discretion to deny institution under 35 U.S.C. § 314(a), citing the Board’s 2017 precedential decision in General Plastic. Prior to Videndum’s petition, the Board instituted review of the same patent at the request of another party. However, one month prior to oral argument in that proceeding, the parties to that IPR proceeding jointly moved to terminate the proceeding on the basis of a settlement. The Board granted the parties’ joint petition.

In the present case, a split Board denied Videndum’s petition for institution, reasoning that Videndum’s petition was a “follow on” of the prior proceeding, and citied General Plastic even while conceding that the “Petitioner’s reliance on [the] earlier-filed petition …, even ‘as a menu and roadmap’” is not sufficient “to create ‘a significant relationship’ that favors denial under the first General Plastic factor.” The dissent agreed on that point but argued that the “General Plastic factors as whole weigh against exercising discretion to deny institution.”

Videndum requested Director review of the Board’s denial of institution based on an abuse of discretion argument. The Director granted review.

The Director found error with the Board’s application of the General Plastic factors in situations where the second-in-time petition is not by the same party that filed the first petition or by a party having a “significant relationship” with the first filer.

The General Plastic factors generally deal with how the Board should analyze whether to institute a subsequent petition on the same patent. Factor one explicitly asks whether the two petitioners are the same. However, the application of the General Plastic factors “is not limited solely to instances when multiple petitions are filed by the same petitioner.” But, when the factors are applied to different petitioners, they have been applied to petitioners who have a “significant relationship” with each other.

Here, both the parties and the Board agreed that there is not a “significant relationship” between the two petitioners. As the Director noted, the PTO has never extended the General Plastic factors “to any cases in which the first and second petitioners do not have a significant relationship.” The Director found the Board’s unprecedented extension of the General Plastics factors to be “improper[],” vacated the Board’s decision, and remanded the case with an instruction to the Board majority to “address the merits of the Petition.”

Practice Note: Patent owners fighting institution of an IPR by a subsequent petitioner should allege facts emphasizing the relationship between the two [...]

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Clean Up on Aisle PTAB: Clarification of Discretionary Denial Practice

by Peter Brunovskis, PhD | May 2, 2024 | Patents

The US Patent & Trademark Office (PTO) issued a Notice of Proposed Rulemaking (NPRM) for inter partes review (IPR) and post-grant review (PGR) proceedings before the Patent Trial & Appeal Board, seeking to codify existing precedent and guidance regarding the Board’s discretionary considerations in denying IPR or PGR petitions. 89 Fed. Reg. 28693 (Apr. 19, 2024).

The NPRM follows a 2020 request for comments and an April 2023 Advance Notice of Proposed Rulemaking (ANPR) that the PTO had hoped to finalize in terms of rulemaking by fall 2023. However, proposals in the ANPR hit a snag following criticism from Congress and more than 14,500 comments from stakeholders and the public, including charges that the PTO Director was overstepping her authority.

The newly proposed rules address:

Briefing on motions for discretionary denial
Factors for discretionary denial
Termination and settlement agreements

Briefing on Motions for Discretionary Denial

A significant aspect of the proposal provides for a separate briefing schedule between a patent owner’s preliminary response (POPR) and a request for discretionary denial, which must be filed no later than one month prior to the deadline for the POPR for briefing on its merits. Under the proposal, the discretionary denial arguments would be excluded from the preliminary response unless otherwise authorized by the Board and are intended to avoid encroaching on the wordcount limits for briefing on the merits. Under the proposed briefing process, there would be a 10-page limit for a patent owner’s request for discretionary denial and for the petitioner opposition, and a five-page limit for the patent owner’s sur-reply.

Factors for Discretionary Denial

The proposed rules address denial of institution for “parallel petitions” or “serial petitions” to provide a framework for considering whether previously presented art or arguments provide grounds for denial. The proposed rules also address treatment of joinder petitions, particularly in relation to already instituted petitions. Parallel petitions are defined in the proposed rule as two or more petitions by the same petitioner challenging the same patent that are filed on or before the filing of a POPR to any of the petitions or on or before the due date for filing a POPR to the first petition. Serial petitions are defined as challenged claims of the same patent overlapping with those in a previously filed petition for IPR, PGR or covered business method patent review.

According to the proposed rules, a parallel petition would not be instituted without a good cause showing of why more than one petition is necessary. Factors for a good cause showing include:

A petitioner’s ranking of desired petitions for consideration
An explanation of differences and materiality between the petitions
The number of challenged patent claims, including those asserted by the patent owner in district court litigation
A priority date dispute
Alternative claim constructions requiring different prior art references on mutually exclusive grounds
Knowledge of asserted claims at the time of filing a petition
Complexity of the technology

Similar considerations would also apply to joinder petitions.

[...]

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