The legal basis for using interference testimony to antedate a reference is rooted in patent law and practice, as documented in the Manual of Patent Examining Procedure (MPEP). Specifically, MPEP 715.07(b) cites a legal precedent: Ex parte Bowyer, 1939 C.D. 5, 42 USPQ 526 (Comm’r Pat. 1939). This case established the practice of using interference…

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