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Collateral Estoppel › Patent Invalidity › Judicial Authority

Patterson Belknap Webb & Tyler LLP

If at First You Don’t Succeed, Do Not Try Again: Judge Oetken Invokes Collateral Estoppel to Dismiss Plaintiff’s Infringement...

Patterson Belknap Webb & Tyler LLP on

On July 9, 2025, Judge J. Paul Oetken (S.D.N.Y) found that collateral estoppel barred plaintiff Linfo IP, LLC from relitigating the validity of its asserted patent and dismissed Linfo’s infringement claims against Aero...more

Akin Gump Strauss Hauer & Feld LLP

Federal Circuit: PTAB Decision of Invalidity Cannot Estop District Court Litigation on Different Claims from the Same Patent, Even...

Akin Gump Strauss Hauer & Feld LLP on

The Federal Circuit recently refused to apply collateral estoppel to claims of a patent asserted in district court litigation based on a Patent Trial and Appeal Board (PTAB) decision finding similar claims from the same...more

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