Appeal No. 96-0671
Application 08/192,078
Independent claim 5 is reproduced as follows:
5. In a digitizing tablet which produces four signals indicative
of the distances of a stylus from four respective corners of the
tablet, the improvement comprising:
a) computing x-y position of the stylus using a computation
based on differences between four pairs of distance
signals; and
b) deriving said differences using difference amplifiers
which suppress common-mode signals in the distance
signals.
The examiner relies on the following reference:
Asher 5,008,497 Apr. 16, 1991
Claim 5 stands rejected under 35 U.S.C. ' 102(b) as
anticipated by Asher.
Reference is made to the briefs and answer for the
respective positions of appellants and the examiner.
OPINION
We reverse.
For a patent claim to have been anticipated under 35 U.S.C.
' 102, all the elements in the claim or equivalents thereof must
have been disclosed in a single prior art reference or device.
Radio Steel & Mfg. Co. v. MTD Prods., Inc., 731 F.2d 840, 845,
221 USPQ 657, 661 (Fed. Cir.), cert. denied, 469 U.S. 831
(1984).
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