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At the Board: Post Grant Proceedings at the PTAB

In re Cuozzo Speed Technologies, LLC

In re Cuozzo presented the Federal Circuit with one of its first opportunities to review a final written decision of the Patent Trial and Appeal Board (the “Board”) in an inter partes review (“IPR”) proceeding. As a result, the appeal addressed several issues of first impression that are at the core of the Board’s trial proceedings, including the proper standard of claim construction during Board trial proceedings, the reviewability of the Board’s institution decisions, and standards applied to a patent owner’s motion to amend claims during an IPR.

As described in more detail below, the Federal Circuit largely upheld the Board’s practices concerning those issues. In so doing, the Cuozzo decision substantially clarifies the standards and procedures that will be applicable to the increasingly popular IPR proceedings.

A.    Claim Construction – Broadest Reasonable Interpretation

Since its inception, the Board has applied the broadest reasonable interpretation standard when construing claims during an IPR according to 37 C.F.R. § 42.100(b), which has engendered considerable commentary and debate. Cuozzo challenged that rule directly, arguing that the Board should have construed the claims using the standards applied in district court rather than the broadest reasonable interpretation.

Recognizing that Congress failed to specify in the America Invents Act the appropriate standard for claim construction, the court looked to historical practice and the PTO’s rulemaking authority to assess the broadest reasonable interpretation standard. The court noted that the PTO has for more than 100 years construed claims according to their broadest reasonable interpretation in various proceedings, including adjudicative contexts such as interferences. Although Congress was aware of the PTO’s longstanding practice, the court found no indication of legislative intent to deviate from the broadest reasonable interpretation standard. In addition, the court concluded that Congress had granted the PTO express authority to regulate the standards applicable to IPR proceedings under 35 U.S.C. § 316(a) and that the agency’s broadest reasonable interpretation standard represented a reasonable interpretation of the governing statutes.

Accordingly, the court approved the Board’s use of the broadest reasonable interpretation during IPR.

B.    Reviewability of Institution Decisions

Cuozzo also argued that the Board had improperly instituted trial on to two claims by relying on grounds not presented in Garmin’s petition. In so doing, Cuozzo challenged the PTO’s position that 35 U.S.C. § 314(d) precludes review of the Board’s institution decisions under any circumstances.

The Federal Circuit had previously held that § 314(d) prohibits (i) review of decisions denying institution of an IPR, St. Jude Med. v. Volcano Corp., 749 F.3d 1373 (Fed. Cir. 2014), In re Dominion Dealer Solutions, LLC, 749 F.3d 1379 (Fed. Cir. 2014), and (ii) interlocutory review of decisions to institute an IPR, In re Procter & Gamble Co., 749 F.3d 1376 (Fed. Cir. 2014). But the court had never squarely addressed the reviewability of an institution decision in an appeal from a subsequent final written decision.

The court concluded that § 314(d) “prohibits review of the decision to institute IPR even after a final decision.” Furthermore, according to the court, there was no bar preventing the Board from finding the two claims at issue unpatentable based on grounds not specifically presented in the petition. Even so, the court declined the PTO’s request to foreclose all review of institution decisions. Instead, the court left open the possibility that, after a final decision, mandamus might be available to challenge a decision to institute an IPR “where the PTO has clearly and indisputably exceeded its authority.” In Cuozzo, however, the court did not reach the issue because the patent owner had not filed a mandamus petition and would not have satisfied the requirements for mandamus even if it had done so.

C.     Standards Governing Motions to Amend

Under 35 U.S.C. § 316(d)(3) and 37 C.F.R. § 42.221(a)(2)(ii), patent owners may not introduce substitute claims that would “enlarge the scope of the claims of the patent” during inter partes review. The court concluded that, to determine whether an amendment broadens the claims, the Board should use the test that is used in reexamination and reissue proceedings: “a claim is broader in scope than the original claims if it contains within its scope any conceivable apparatus or process which would not have infringed the original patent.” In a footnote, the court further specified that a claim is broadened if it is “broader in any respect” compared to an original claim, even if it was narrower in other respects.

Applying the stated test, the court held that the Board had correctly denied Cuozzo’s motion to amend because the proposed substitute claim would have covered an embodiment that fell outside of the original claims.

D.    The Cuozzo Dissent

Judge Newman dissented as to the claim construction standard and the court’s ability to review institution decisions. She would have applied the Phillips standard used for district court claim construction determinations. Her dissent emphasized the adjudicative nature of IPR proceedings and asserted that, as a practical matter, the opportunity to amend claims during IPR is “almost entirely illusory.” As to institution decisions, Judge Newman emphasized a general presumption that agency decisions should be subject to judicial review. As such, she read § 314(d) as prohibiting only interlocutory review of the Board’s institution decisions.

E.     Conclusions

In Cuozzo, the Federal Circuit has decided several issues with far-reaching implications for practice before the Board. First, the court has settled, at least for now, the governing claim construction standard to be used for Board proceedings. It is worth noting, however, that members of Congress have introduced proposed legislation (The Innovation Act, H.R. 9, introduced February 5, 2015; The STRONG Patents Act, introduced in the Senate on March 3, 2015) that would expressly apply the district court standard for claim construction to both IPR and post-grant review. Second, the court left open the opportunity to review the propriety of Board’s decision to institute by petitioning for a writ of mandamus after issuance of a final written decision. It remains to be seen whether the court will in fact entertain such a mandamus petition in an appropriate future case. Finally, the court defined the exacting standard that will be used to assess substitute claims for permissible scope in compliance with § 316(d)(3). As such, Cuozzo establishes several benchmarks in the developing law governing Board trial proceedings and should be considered by any party or practitioner appearing before the Board or considering an appeal.

Trends at the Board

The number of AIA petitions filed continues to grow with over 800 petitions filed in FY2015.

IPR Trends at the Board Sept. 2012 — Feb. 2015

Petitions Filed


Petitions Denied

422 (24%)

Trials Instituted

1,215 (76%)

Trials Dismissed/Settled


Final Written Decisions


©2022 MICHAEL BEST & FRIEDRICH LLPNational Law Review, Volume V, Number 72

About this Author

Martin Stern, Michael Best Law Firm, Intellectual Property Attorney

Marty Stern is a partner in the Intellectual Property practice group, as well as a past member of the firm’s Management Committee and a former Co-chair of the Intellectual Property practice group. Over the course of his career, Marty has been involved in a wide variety of intellectual property litigation matters, including trademark, copyright and patent infringement matters, trade secret misappropriation, enforcement of restrictive covenants and unfair competition matters. His experience in contested patent matters includes challenging the validity of patents in U.S....

Kevin P. Moran, Intellectual Property attorney, Michael Best, manufacturing industry legal counsel,

Clients look to Kevin for strategic counsel on the protection of their intellectual property, including acquisition of, enforcement of, and defense against United States and international patents.

His strong track record in these areas, paired with a technical background as a product engineer, give Kevin a unique perspective on the challenges facing developers of mechanical, electro-mechanical, and biomedical technologies.

Kevin has significant experience in the areas of fitness equipment, motorcycles, vehicle braking...

Marshall Schmitt, Michael Best Law Firm, Life Sciences and Intellectual Property Attorney

Marshall’s practice focuses on resolving disputes regarding scientific issues and counseling clients in chemical and biotechnology matters. A skilled first chair litigator and trial lawyer, his practice includes helping clients develop strategies for obtaining and effectively enforcing their intellectual property rights.

Clients seek Marshall's advice to help solve complex intellectual property-related problems. His strong grasp of IP, together with effective use of internal investigations, enable him to understand how a dispute will...

Gilberto E. Espinoza, intellectual property law attorney michael best law firm

Gilberto is a persuasive and effective advocate for clients seeking to protect their intellectual property assets. Focusing his practice on patent litigation at both the trial and appellate levels, he is actively involved in all phases of litigation and trial.

He has built an enviable track record by successfully challenging patents in inter partes review (IPR) proceedings at the Patent Trial and Appeal Board and by fighting off patent infringement suits. Gilberto is also experienced in handling litigation stemming from issues related to unfair competition, false...

Edward J. Evans Intellectual Property attorney Practice michael best law firm

A partner in the Intellectual Property Practice Group, Ed focuses on the prosecution of U.S. and international patent applications involving mechanical and electro-mechanical subject matter. 

Trained as a mechanical engineer and with experience in industry, he handles applications dealing with varied technologies, including:

  • Internal combustion engines, particularly motorcycle and single-cylinder utility engines

  • Motorcycle oiling, air intake and exhaust systems

  • ...