Application No. 08/176,867
2
incur less power dissipation . The examiner has drawn attention to
no evidence which teaches that power dissipation was a problem in
the prior art because voltage signals were compared. There is
simply no evidence establishing facts which would have motivated
one of ordinary skill in the art to modify the prior art as
suggested by the examiner. The mere fact that the prior art may
have been modified in the manner suggested by the examiner does
not make the modification obvious unless the prior art suggested
the desirability of the modification. In re Fritch, 972 F.2d
2 With respect to this issue of comparing current signals, the
prior art to Conway and Selviah et al. are not relied on by the
examiner.
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