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Federal Circuit Affirms PTAB Win for Unified But Clarifies Reading of Rehearing Regulation

In a recent precedential decision, the U.S. Court of Appeals for the Federal Circuit (CAFC) affirmed the Patent Trial and Appeal Board’s (PTAB) determination that all claims of Voice Tech Corp.’s patent on voice command technology were unpatentable as obvious. This decision, arising from the case Voice Tech Corp. v. Unified Patents, LLC, also clarified that arguments not raised in a PTAB request for rehearing are not necessarily forfeited on appeal.

Case Background

Unified Patents, LLC filed a petition for inter partes review (IPR) challenging all claims of Voice Tech Corp.’s U.S. Patent No. 10,491,679. The patent, titled “Using Voice Commands from a Mobile Device to Remotely Access and Control a Computer,” was alleged to be obvious over two prior art references: “Wong” and “Beauregard.” The PTAB sided with Unified, finding all claims unpatentable. Voice Tech subsequently appealed this decision.

Key Issues on Appeal

Claim Construction and Prior Art Analysis: Voice Tech argued that Unified’s petition failed to properly identify disclosures in Wong relating to the “mobile device interface” recited in claims 5 and 7. Both the PTAB and CAFC found that Voice Tech’s interpretation was incorrect. The CAFC affirmed that the PTAB did not create an obviousness theory on Unified’s behalf but correctly referred back to Unified’s analysis of related claim limitations.

Forfeiture of Claim Construction Arguments: Unified contended that Voice Tech forfeited its claim construction arguments by not including them in its request for rehearing before the PTAB. However, the CAFC clarified that 37 C.F.R. § 42.71(d) does not mandate filing a rehearing request to preserve appeal rights. The court distinguished this case from Polycom, Inc. v. Fullview, Inc., noting that Voice Tech had raised and the Board had ruled on the constructions during the IPR proceedings, thus no forfeiture occurred.

Impact of Claim Construction on Obviousness Findings: Despite finding no forfeiture, the CAFC agreed with Unified that the proposed new constructions would not alter the Board’s obviousness determination. The court declined to construe the terms further, as Voice Tech did not demonstrate any resulting prejudice.

Conclusion

The CAFC’s decision in Voice Tech Corp. v. Unified Patents, LLC reinforces the principles surrounding claim construction and the preservation of arguments for appeal. While Unified’s petition was upheld, the ruling underscores that optional rehearing requests do not limit a party’s right to appeal issues already considered by the PTAB. Furthermore, the decision confirms that demonstrating prejudice is crucial when challenging claim constructions on appeal.

For businesses and legal professionals involved in patent litigation, this case highlights the importance of meticulous claim construction and thorough presentation of arguments during PTAB proceedings. Understanding the nuances of procedural requirements and evidentiary support remains critical for effective advocacy in patent disputes.

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For more information on how this decision might impact your business or for assistance with patent litigation and inter partes reviews, contact our experienced legal team today. Our attorneys are well-versed in intellectual property law and are here to guide you through every step of the process.

Gayatri Gupta