Appeal 2006-2328
Application 10/131,049
signal and, in fact, provides no reason for the omitted horizontal
synchronizing signal (id. at 16). It is argued that one of ordinary skill in the
art would not have concluded that noise would affect horizontal and vertical
sync signals output from a compute to a display, and that the Examiner has
provided no evidence that synchronizing signals from a computer are subject
to corruption by noise so as to motivate one of ordinary skill in the art to
include vertical countdown circuitry to generate reference vertical
synchronizing signals (id. at 16-17).
Issues (2) and (3) analysis
As a matter of claim interpretation, we interpret "reference horizontal
and vertical synchronous signals" to mean "substitutes or replacements" for
missing horizontal and vertical synchronous signals. This is consistent with
the Examiner's interpretation of "reference" signals as "replacement" signals
for missing signals (Answer at 19-21).
The circuit 306 in Arai only generates reference horizontal
synchronizing signals when the horizontal synchronizing signals are missing
during a vertical synchronizing signal portion of the signal and does not also
generate reference vertical synchronizing signals. The Examiner errs in
finding that Arai teaches generating reference vertical synchronous signals.
The Examiner apparently recognized the deficiency in Arai and
belatedly attempted to address the missing limitations by finding in the
Advisory Action that it was notoriously well known to utilize countdown
circuits to generate replacement reference synchronizing signals when the
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