The opinion in support of the decision being entered today was not
written for publication and is not binding precedent of the Board
Paper No. 19
UNITED STATES PATENT AND TRADEMARK OFFICE
_______________
BEFORE THE BOARD OF PATENT APPEALS
AND INTERFERENCES
_______________
Ex parte PAUL D. LITZENBERGER,
JOHN A. FEE,
G. MICHAEL EASTEP, and
ROBERT W. BORN
______________
Appeal No. 2002–1241
Application 08/883,141
_______________
ON BRIEF
_______________
Before THOMAS, HAIRSTON and KRASS Administrative Patent Judges.
KRASS, Administrative Patent Judge.
DECISION ON APPEAL
This is a decision on appeal from the examiner’s final rejection of claims 1-16, all the
claims currently pending in the application. The invention is directed to an echo canceller system.
Echo canceller systems are used to reduce or eliminate the presence of reflected voice
signals in telephone lines, e.g., in conventional digital voice transmissions. Integrated Services
-1-
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