Appeal No. 1998-0463
Application No. 08/450,849
second resistors providing an automatic gain control portion.
In our opinion, the subject matter of claim 18 would have
been obvious to one having ordinary skill in the art, from a
collective assessment of the applied Lowenstein teachings.
More specifically, as we see it, one having ordinary skill in
the art would have been motivated by the explicit teaching of
the auto-gain feature of Lowenstein '114 (column 6, lines 41
through 55) to select an appropriate auto-gain circuit from
among known and available auto-gain circuits for their
expected advantages, e.g. an auto-gain circuit having first
and second resistors. It is our understanding that the latter
circuit would have been available to those having ordinary
skill in the art at the time of the present invention,
particularly based upon the acknowledgment in appellant’s
specification (page 4) that the invention is completely based
on commercial off-the-shelf components. It is for the above
reasons that we affirm the rejection of claim 18.
Claim 20
6
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