Appeal No. 2001,0712
Application 08/148,887
a suggestion to combine prior art references. In re
Dembiczak, 175 F.3d at 1000-01, 50 USPQ2d at 1617-19.
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,
22
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