How does joint inventorship affect prior art determination under 35 U.S.C. 102(e)?

Joint inventorship has significant implications for prior art determination under 35 U.S.C. 102(e). The MPEP 2136.04 provides guidance:

“If the application names a subset of joint inventors A and B of a patent naming inventors A, B and C, the patent is ‘by another’ and therefore qualifies as prior art under pre-AIA 35 U.S.C. 102(e).”

This means that even if there’s overlap in inventors, a difference in the full inventive entity can still make a patent qualify as prior art. It’s crucial to consider the complete list of inventors when making this determination.

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Topics: MPEP 2100 - Patentability, MPEP 2136.04 - Different Inventive Entity; Meaning Of "By Another", Patent Law, Patent Procedure
Tags: 35 U.S.C. 102(E), Inventive Entity, Joint Inventorship