Appeal No. 94-3710
Application 07/777,608
skilled in the art at the time the invention was made to
combine Kaplinsky's inclusion (presence) bit for descriptor-
data cache coherency with the segment descriptor cache
selector system of Cepulis, since the resulting memory
management system would provide more efficient retrieval of
descriptor data . . . ." Id.
Cepulis does not make up for the deficiencies in
Kaplinsky. Cepulis teaches a method for managing memory in a
computer system which contains a segment descriptor cache.
See col. 5, lines 5-40. Cepulis does not contain any teaching
with regard to maintaining coherency between entries in the
segment descriptor cache and entries in a data cache. In
fact, Cepulis does not disclose or discuss a data cache.
Thus, Cepulis does not teach setting a bit to indicate that
there is a relationship between entries in a data cache and a
segment descriptor cache as recited in appellant's claim 1.
It is the examiner's burden to establish why one having
ordinary skill in the art would have been led to the claimed
invention by the express teachings or suggestions found in the
prior art, or by implications contained in such teachings or
suggestions. See In re Sernaker, 702 F.2d 989, 995, 217 USPQ
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