Appeal No. 1998-3389
Application No. 08/386,794
second tracking error signal generating means for
generating, when the tracking control system operates in the
second operating state, a signal which represents a difference
between the sums of the detector signals produced by the
sub-detectors of the first auxiliary detector and the second
auxiliary detector as the tracking error signal.
The references relied upon by the examiner are:
Philips GB1434834 May 5, 1976
Yoshio et al. (Yoshio) 5,216,652 Jun. 1, 1993
Jongenelis et al. (Jongenelis) 5,235,583 Aug. 10, 1993
Claims 1 to 6 stand rejected under 35 U.S.C. § 103(a) as
being unpatentable over Jongenelis in view of Yoshio or the
Philips references.
OPINION
We have carefully considered the entire record before us and
we will sustain the 35 U.S.C. § 103(a) rejection of claims 1 to
6.
In Jongenelis, the scanning spot is kept "on the centerline
of a track to be scanned in the first mode" (column 1, lines 23
and 24).
According to the appellant (Brief, page 4), "Jongenelis et
al. identify the primary objective of their invention to be the
3
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