What is the significance of pre-AIA 35 U.S.C. 118 in relation to proprietary interest in patent applications?

Pre-AIA 35 U.S.C. 118 is significant in determining what constitutes a valid assignment or sufficient proprietary interest for filing a patent application. According to MPEP 409.03(f): “An assignment to a pre-AIA 37 CFR 1.47(b) applicant for the sole purpose of obtaining a filing date for a pre-AIA 37 CFR 1.47(b) application is not considered an…

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