Appeal No. 2001-1628 Page 5
Application No. 09/054,794
In rejecting claims under 35 U.S.C. § 103, the examiner bears the initial burden
of presenting a prima facie case of 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).
A critical step in analyzing the patentability of claims pursuant to 35 U.S.C. § 103
is casting the mind back to the time of invention, to consider the thinking of one of
ordinary skill in the art, guided only by the prior art references and the then-accepted
wisdom in the field. See In re Dembiczak, 175 F.3d 994, 999, 50 USPQ2d 1614, 1617
(Fed. Cir. 1999). Close adherence to this methodology is especially important in cases
where the very ease with which the invention can be understood may prompt one "to
fall victim to the insidious effect of a hindsight syndrome wherein that which only the
invention taught is used against its teacher." Id. (quoting W.L. Gore & Assocs., Inc. v.
Garlock, Inc., 721 F.2d 1540, 1553, 220 USPQ 303, 313 (Fed. Cir. 1983)).
Most if not all inventions arise from a combination of old elements. See In re
Rouffet, 149 F.3d 1350, 1357, 47 USPQ2d 1453, 1457 (Fed. Cir. 1998). Thus, every
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