Appeal No. 2000-1425
Application No. 07/921,508
needed (ie, unstable conditions or feedback detected either by
user or special hardware) as suggested by both Graupe and
Goodings."
Goodings, however, discloses (column 7, lines 18-20)
continuous adaptation. Thus, Goodings fails to provide the
claimed user control. Goodings does teach (column 11, lines 28-
53) a user controlled volume control and limiter level. Neither
of the user controls, though, controls when the adaptive filter
is activated, as the adaptation is continuous. Accordingly, the
combination of Graupe and Goodings fails to disclose each and
every limitation of the claims. Consequently, we cannot sustain
the obviousness rejection of independent claims 1, 12, 14, 15,
and 18, nor of their dependents, claims 4 and 6.
Regarding the rejection of claims 7, 9, 11, 13, 16, and 17
over Graupe, Goodings, and Harris, and of claim 8 over Graupe,
Goodings, Harris, and Widrow, each of independent claims 7, 13,
16, and 17 includes a user-controlled activation means for
controlling the time of activating filter adaptation without
changing the filter's operating characteristics except as a
result of the adaptation, previously found lacking from Graupe
and Goodings. Neither Harris nor Widrow (nor the combination
thereof) overcomes the deficiencies of the primary combination of
Graupe and Goodings. Accordingly, we cannot sustain the
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