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4. Ex parte Muller, 81 USPQ 261, (Patent Office, Board of Appeals, 1947).
5. In re Robertson and Scripps, 169 F.3d 743, Case No. 98-1270 (US Court of Appeals, Federal Circuit, 1999).
http://www.ll.georgetown.edu/federal/judicial/fed/opinions/98opinions/98-1270.html