Appeal No. 1998-0688
Application 08/274,158
teachings or suggestions. In re Sernaker, 702 F.2d 989, 995,
217 USPQ 1, 6 (Fed. Cir. 1983). “Additionally, when
determining obviousness, the claimed invention should be
considered as a whole; there is no legally recognizable
‘heart’ of the invention.” Para-Ordnance Mfg. v. SGS
Importers Int'l, Inc., 73 F.3d 1085, 1087, 37 USPQ2d 1237,
1239 (Fed. Cir. 1995), cert. denied, 519 U.S. 822 (1996)
(citing W.L. Gore & Assoc., Inc. v. Garlock, Inc., 721 F.2d
1540, 1548, 220 USPQ 303, 309 (Fed. Cir. 1983), cert. denied,
469 U.S. 851 (1984)).
We are not inclined to dispense with proof by evidence
when the proposition at issue is not supported by a teaching
in a prior art reference or shown to be common knowledge of
unquestionable demonstration. Our reviewing court requires
this evidence in order to establish a prima facie case. In re
Piasecki, 745 F.2d 1468, 1471-72, 223 USPQ 785, 787-88 (Fed.
Cir. 1984); In re Knapp-Monarch Co., 296 F.2d 230, 232, 132
USPQ 6, 8 (CCPA 1961); In re Cofer, 354 F.2d 664, 668, 148
USPQ 268, 271-72 (CCPA 1966). Furthermore, our reviewing
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