Appeal No. 96-4014
Application 08/192,939
of the fuzzy logic hierarchical controller that generates a
single output value derived from an aggregation of control
variable values, wherein the aggregation is a weighted sum of the
control values" (Brief, pages 9 and 15). The prior art is not
relied on for these teachings. One cannot show nonobviousness by
attacking the references individually where the rejection is
based on a combination of references. In re Keller,
642 F.2d 413, 426, 208 USPQ 871, 882 (CCPA 1981). Hisano is
relied on for the teaching of a fuzzy logic controller that
generates an output value that is an aggregation of control
variable values.
Appellants further argue that "neither the MPU nor the mode
selector suggest generating a single output value derived from an
aggregation of control variable values, wherein the aggregation
is a weighted sum of the control values" (Brief, page 9). The
test is what the combined teachings of the references would have
suggested to those of ordinary skill in the art. Id. at 425,
208 USPQ at 881. The admitted prior art mode selector of
figure 2 teaches taking a plurality of input variable values from
the low level controllers and computing the single output
variable value of fuel flow (or fuel flow derivative as shown in
appellants' figure 3b). As demonstrated by Hisano, one skilled
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