Appeal No. 95-2218
Application 07/902,073
phase-locked loop (PLL) synchronized with the clock signal.
(7:37-46.)
12. Pederson does not teach three separate comparators
comparing the output of the variable-delayed data pulse and the
window pulse, the DRDSS-delayed data pulse and the window pulse,
and the outputs of the preceding comparators, respectively, as
set forth in claim 13.
13. The Fischler reference teaches a method and apparatus
for constant density recording of zones on a hard disk drive.
(2:12-29.) Fischler teaches that constant-density recording has
the advantage of maximizing disk storage capacity. (1:23-41.)
Fischler's zone-based constant-density recording system is
disclosed to be a good compromise of access time, cost, size,
reliability, and storage capacity. (1:42-2:29.)
14. Appellant concedes that a hard drive using Fischler's
constant density recording is the same as the claimed "zone bit
recorded data storage device". (Paper 14 at 9.) Appellant
further concedes for the purposes of appeal "that Fischler's
anticipator [62] corresponds to Appellant's DRDSS circuit."
(Paper 14 at 10.) We find these concessions to be consistent
with the record.1
1 Appellant's disclosure could be read to discourage the
use of Fischler's anticipator because, among other things, it
(continued...)
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