Appeal No. 95-4913
Application No. 07/962,425
data from a teletype to a printing device. Heckel
describes routing data from an input latch to an output
latch when the data includes repeating characters. At
other times, data is routed from an input latch,
through a shift register, and then to the output latch.
All devices in Heckel are clocked at the same clock
frequency.
Appellants have correctly concluded (Brief, page 6) that
“[e]ven if Heckel is combined with Flemming, the combination does
not describe Applicants[’] method and system,” especially
“determining particular periods of time during which
metastability may occur” (claims 1 and 6).
Azevedo teaches digital compensation of oscillator drift by
providing phase alignment between two clock signals. We agree
with appellants (Brief, page 8) that Flemming, Heckel and Azevedo
neither teach nor would they have suggested to one of ordinary
skill in the art “the claimed elements.”
In summary, the obviousness rejection of claims 1, 3 through
6 and 8 through 10 is reversed.
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