Appeal No. 2001-1074 Page 9
Application No. 08/989,056
obviousness. See In re Rijckaert, 9 F.3d 1531, 1532, 28
USPQ2d 1955, 1956 (Fed. Cir. 1993). A prima facie case of
obviousness is established by presenting evidence that would
have led one of ordinary skill in the art to combine the
relevant teachings of the references to arrive at the claimed
invention. See In re Fine, 837 F.2d 1071, 1074, 5 USPQ2d
1596, 1598 (Fed. Cir. 1988) and In re Lintner, 458 F.2d 1013,
1016, 173 USPQ 560, 562 (CCPA 1972).
Evidence of a suggestion, teaching, or motivation to
modify a reference may flow from the prior art references
themselves, the knowledge of one of ordinary skill in the art,
or, in some cases, from the nature of the problem to be
solved, see Pro-Mold & Tool Co. v. Great Lakes Plastics, Inc.,
75 F.3d 1568, 1573, 37 USPQ2d 1626, 1630 (Fed. Cir. 1996),
Para-Ordinance Mfg., Inc. v. SGS Importers Int'l., Inc., 73
F.3d 1085, 1088, 37 USPQ2d 1237, 1240 (Fed. Cir. 1995), cert.
denied, 117 S. Ct. 80 (1996), although "the suggestion more
often comes from the teachings of the pertinent references,"
In re Rouffet, 149 F.3d 1350, 1355, 47 USPQ2d 1453, 1456 (Fed.
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