Appeal No. 1999-0490
Application 08/335,917
so doing, the examiner is expected to make the factual
determinations set forth in Graham v. John Deere Co., 383 U.S.
1, 17, 148 USPQ 459, 467 (1966), and to provide a reason why
one having ordinary skill in the pertinent art would have been
led to modify the prior art or to combine prior art references
to arrive at the claimed invention. Such reason must stem
from some teaching, suggestion or implication in the prior art
as a whole or knowledge generally available to one having
ordinary skill in the art. Uniroyal, Inc. v. Rudkin-Wiley
Corp., 837 F.2d 1044, 1051, 5 USPQ2d 1434, 1438 (Fed. Cir.),
cert. denied, 488 U.S. 825 (1988); Ashland Oil, Inc. v. Delta
Resins & Refractories, Inc., 776 F.2d 281, 293, 227 USPQ 657,
664 (Fed. Cir. 1985), cert. denied, 475 U.S. 1017 (1986); ACS
Hosp. Sys., Inc. v. Montefiore Hosp., 732 F.2d 1572, 1577, 221
USPQ 929, 933 (Fed. Cir. 1984). These showings by the
examiner are an essential part of complying with the burden of
presenting a prima facie case of obviousness. Note In re
Oetiker, 977 F.2d 1443, 1445, 24 USPQ2d 1443, 1444 (Fed. Cir.
1992). If that burden is met, the burden then shifts to the
applicant to overcome the prima facie case with argument
and/or evidence. Obviousness is then determined on the basis
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