Appeal No. 95-4547
Application No. 08/097,697
Although the examiner is not clear as to how, exactly, the
dual detection means of Baba is to be incorporated into the device of
Ohtake, even if we accepted this combination, it is still not clear
how or why the artisan would have combined Anderson with Ohtake in
the manner set forth by the examiner.
Anderson does not track non-defective discs but, rather,
relative tracking errors are determined and stored for one revolution
and a composite position error signal is generated that more
accurately follows the data track centerline of the disc surface
being addressed. We find nothing in Anderson that would have led the
artisan to have modified the teaching of Ohtake in order to provide
therein storage of regulating signal values, at predetermined
intervals, "for at least the last most prior one rotation of the
rotating recording medium," as claimed. As explained by appellant,
at page 5 of the brief, Anderson stores one rotation of calibration
signals but does not continuously update the calibration signals
whereas instant claim 1 recites "successively [i.e., continuously]
storing regulating signal values, at predetermined intervals, in
memory for at least the last most prior one rotation of the rotating
recording medium."
The examiner's rationale of combining Anderson with Ohtake
"in order to achieve a high degree of accuracy in head
5
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