Appeal No. 2006-0871
Application No. 10/678,799
invention. Specifically, claim 1 recites that the frequency
spectral result of the current ripples be “such that the
determined frequency spectral result of the current ripples
contained in the armature current signal is void of frequency
components which are superimposed on the armature current signal
as the interference” [emphasis added]. This recitation requires
that no trace of the interference be present in the resulting
signal representative of current ripples. The result described
by Falk includes a residual interference component [column 3,
lines 43-44]. Although the examiner asserts that this residual
component is eliminated in the preferred embodiment of Falk,
there is no support for this position in Falk. To the contrary,
the only operation disclosed by Falk is that an oscillation in
the control loop occurs between an undercompensation and an
overcompensation. Thus, Falk teaches, if anything, that the
resultant signal is not normally void of the interference. Since
the claimed invention specifically recites the feature quoted
above, and since the examiner’s findings are not supported by the
applied prior art, the examiner’s findings fail to support a case
of obviousness.
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