Appeal No. 1998-1365 Page 8
Application No. 08/663,969
specification.” In re Van Geuns, 988 F.2d 1181, 1184, 26
USPQ2d 1057, 1059 (Fed. Cir. 1993) (citing In re Zletz, 893
F.2d 319, 321, 13 USPQ2d 1320, 1322 (Fed. Cir. 1989)). Here,
representative claim 36 specifies in pertinent part the
following limitations: “determining if ... said clock signal
and said reference clock signal are substantially aligned by
counting a number of cycles of said clock signal occurring in
a predetermined period of time.” Giving the claim its
broadest reasonable interpretation, the limitations recite
determining alignment between a clock signal and a reference
clock signal by counting the number of cycles of the clock
signal occurring in a predetermined period of time.
Marshall and Vanderspool each teach the claimed
limitation. We address the references seriatim.
Marshall teaches determining alignment between a clock
signal and a reference clock signal. Specifically, “a phase
difference counter is utilized for detecting the phase error
between a local clock signal and a received remote clock
signal.” Col. 1, ll. 47-50. “A correction algorithm ...
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