Following recent decisions at the US Court of Appeals for the Federal Circuit regarding the use of applicant-admitted prior art (AAPA) in inter partes reviews, the United States Patent and Trademark Office (USPTO) issued a memorandum effectively prohibiting the use AAPA, expert testimony, common sense, and other general knowledge to supply missing claim limitations.
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USPTO Tightens Rules on General Knowledge in IPRs: Federal Circuit's AAPA Guidance Prompts Agency Response
