Appeal No. 1998-1119
Application No. 08/482,924
bits do not agree, then the data is subjected to error
correction.
In the error detection scheme disclosed by Knauft, a
stored word is read immediately after it is stored (Abstract).
According to Knauft (column 3, lines 20 through 26), each word
that is stored is accompanied by a parity bit and a marking
bit which indicates whether the word was stored in inverted
form or not. “When the word is read later on, it is again
inverted by virtue of the marking in the additional storage
element to retrieve the original correct information supplied”
(Abstract).
Based upon the teachings of Burghard and Knauft, the
examiner is of the opinion (answer, page 5) that “it would
have been obvious to a person of ordinary skill in the art to
correct Burghard’s parity bit detected error by Knauft’s
method as suggested by both of them so that error free data
can be obtained from defective memory locations.”
Appellants argue (brief, page 17) that:
Thus, Applicants store only a parity bit and the
corresponding digital data word. As noted above,
Burghard stores multiple parity bits and so teaches
away.
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