Appeal No. 1998-2479
Application 08/419,512
the life of the unit, the artisan would have utilized a ROM. Therefore, at least from a
structural point of view, the memory 126 in representative Figure 4 of Suzuki comprises
the claimed nonvolatile memory means.
Because of the alternative approach utilized in the memory means clause of
storing a compensatory value corresponding to differences of servo characteristics of
either a focus servo control apparatus or a tracking servo control apparatus, the
teachings of Suzuki have not been questioned by appellants since it directly utilizes the
memory 126 in Figure 4 to change or alter the focus servo control apparatus at the top
of this figure.
We do not agree with appellants' views that Suzuki's storage of the table lookup
data does not comprise a discrete compensatory value, that the reference discloses
that the compensatory values are computed internally within the MPU 125 not through
the use of external measurement means and that the compensatory values disclosed in
this reference are not uniquely determined for an individual optical disc apparatus. At
least with respect to the teachings of Figure 2, the discussion at column 8, lines 36
through 48 indicates that certain offset correction data has already been memorized in
the logic circuit 23 of this Figure for correcting offset errors in that circuit. At column 11,
lines 11 through 13, the memory 126 in Figure 4 memorized data for correcting the
focus offset and is connected to the same MPU 125 for the Figure 4 embodiment. The
examiner has correctly referenced the material at column 12 indicating that that
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