Appeal No. 96-3302
Application No. 08/160,119
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).
With respect to independent claim 1, the examiner
asserts that Harmon teaches all the recited steps except for
the summing step. The examiner concludes that the summing
step would have been obvious to the artisan because Harmon
teaches a comparing step which includes subtraction which is
the addition of a negative number [answer, page 2].
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