Inventor Testimony of Reduction Date Leads to Denial, PTAB Litigation Blog
Visit the PTAB Litigation Blog
The Patent Trial and Appeal Board (PTAB) denied institution of an inter partes review (IPR) brought by Par-Kan Company, LLC against Unverferth Manufacturing Company regarding U.S. Patent No. 8,967,940 (“the ‘940 patent”). Par-Kan Co., LLC v. Unverferth Mfg. Co., IPR2024-01426, Paper 10 (P.T.A.B. Mar. 19, 2025). The PTAB found the Patent Owner had successfully established a reduction to practice antedating Petitioner’s references by relying on inventor testimony along with corroborating independent evidence.
Insights by Jones Day should not be construed as legal advice on any specific facts or circumstances. The contents are intended for general information purposes only and may not be quoted or referred to in any other publication or proceeding without the prior written consent of the Firm, to be given or withheld at our discretion. To request permission to reprint or reuse any of our Insights, please use our “Contact Us” form, which can be found on our website at www.jonesday.com. This Insight is not intended to create, and neither publication nor receipt of it constitutes, an attorney-client relationship. The views set forth herein are the personal views of the authors and do not necessarily reflect those of the Firm.
