Appeal No. 2000-1361 Page 8
Application No. 08/933,880
establish that the subject matter existed and that its existence
was recognized by persons of ordinary skill in the field of the
invention. See In re Spada, 911 F.2d 705, 708, 15 USPQ2d 1655,
1657 (Fed. Cir. 1990); Diversitech Corp. v. Century Steps, Inc.,
850 F.2d 1566, 1567, 7 USPQ2d 1315, 1317 (Fed. Cir. 1988).
After reviewing the teachings of Richardson and considering
the arguments of record, we disagree with the Examiner that
enable signal sent from comparators 510-560 to output registers
570-630 and 670 (depicted in Fig. 5) is the same as the claimed
enable signal. Richardson, in col. 4, lines 2-11 teaches:
Registers 570, 580, 590, 600, 620 and 630 store the
concurrently determined results for the instances of trivial
operands. If any of the tests performed by comparators 510-
560 result in a positive response indicating that one of the
operands is a trivial operand, a halt signal is issued by
the comparator to the multiplier 500 and an output signal is
issued to the corresponding register 570, 580, 590, 600, 620
and 630 which outputs immediately the result. [Emphasis
added.]
Therefore, when one of the tests, say x=1, indicates a trivial
operand, the "analysis unit" (comparator block 520) outputs a
signal to the "output register" (register 580) which outputs
immediately the result. The result has been previously stored in
register 580 and is sent to output register 670 without going
through multiplier 500. Although comparators 510-560, similar to
the claimed analysis unit, analyze the values provided by input
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