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Perhaps Assignor Estoppel Survives at the PTAB…via the District Court

A preliminary decision in the District Court of Delaware introduces the possibility that a patentee’s victory on assignor estoppel in the district court could quash a co-pending IPR proceeding at the PTAB. Assignor estoppel...more

Sirona Dental Systems GMBH v. Institut Straumann AG

Federal Circuit Summaries - Before Prost, Moore, and Stoll. Appeal from the Patent Trial and Appeal Board. Summary: An IPR petitioner bears the burden of persuasion concerning the patentability of proposed substitute...more

The PTAB Authorizes Additional Motion To Amend Briefing in View of Aqua Products

The Board authorized petitioner Kingston to file a Response to the patent owner’s Reply to petitioner’s Opposition to Motion to Amend, based on the Federal Circuit’s en banc holding that the burden to establish...more

Defect in Patent Assignment Results in IPR Challenge Effectively Going Unopposed

Old Republic’s IPR petition was effectively unopposed due to a defect in the chain of assignment, which led the PTAB to hold all claims unpatentable without considering arguments or evidence submitted in favor of...more

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