Patent reissue allows a patentee to correct a wide variety of errors in an issued patent if the error renders the patent partially or wholly inoperative or invalid. In the last five years, Finnegan has handled more than 100 patent reissue proceedings. Filing a reissue has associated risks and limitations, especially when attempting to broaden patent claims. Finnegan attorneys have extensive experience in mapping out a course of action in view of those inherent risks and limitations. We regularly counsel patent owners through the thicket of reissue challenges to achieve a cost-effective strategy that meets the goals for not only the patent at issue, but also the client’s portfolio as a whole.
At the PTAB Blog
May 25, 2021
Federal Circuit IP Blog
Written Description Must Clearly and Unequivocally Disclose Broadened Claims in Reissue Patents
June 28, 2019
Webinar
Strategic Use of Patent Reissue: Determining Whether and When to Pursue a Reissue Application
January 14, 2016
Webinar
Award/Ranking
Finnegan Named Law Firm of the Year for Patent Law in the 2026 Best Law Firms Rankings
November 6, 2025
Award/Ranking
IAM Recognizes Six Finnegan Partners in its 2026 Global Leaders Guide
October 22, 2025
Award/Ranking
Seven Finnegan Attorneys Recognized in the 2025 IAM Global Leaders Guide
October 23, 2024
Award/Ranking
Women in Business Law Americas Awards 2024: Three Finnegan Attorneys Shortlisted
April 7, 2024
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