Appeal No. 2000-0379
Application No. 08/815,352
various aspects of the construction and operation of certain
read channel chips that are custom-made for the disk drives
manufactured by WDC; that during a series of meetings between
July 1993 and December 1993, he, Mr. Cloke (the inventor), and
other WDC engineers worked as a team to develop a performance
specification (the "WDC Performance Specification") for a
proposed custom read channel chip, which specification
included a performance specification for robust frame
synchronization detection (the "WDC robust sync mark detection
specification"); and that during these meetings Mr. Cloke
disclosed to Hull a criterion (the "Cloke Criterion") for
selecting a robust sync mark appropriate for the WDC robust
sync mark detection specification, which criterion involved
providing a preamble write string and a sync mark write string
that correspond to a concatenated string of expected symbols,
where the sync mark write string corresponds to a set of "m"
expected symbols that are selected to have the maximum
distance from all non-mark substrings of "m" consecutive
expected symbols that exist in the concatenated string of
expected symbols formed by the preamble write string and data
sync mark string. Hull Decl. ¶¶ 2-5.
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