Appeal No. 97-1656 Page 11
Application No. 08/314,26
in the background section. (Id.) In response, the examiner
points to the characters “ACBD” and “DCBA” displayed in
Figures 3 and 5. (Examiner’s Answer at 8-9.)
The rule that anticipation requires that every element of
a claim appear in a single reference, moreover, accommodates
situations where the common knowledge of “technologists” is
not recorded in the reference, i.e., where technical facts are
known to those in the field of the invention. Continental Can
Co. v. Monsanto Co., 948 F.2d 1264, 1269, 20 USPQ2d 1746,
1749-50 (Fed. Cir. 1991). Those in the field of screen
displaying would know that a menu was commonly displayed on a
TV screen at the time of the invention. Takahashi, col. 1,
ll. 34-35. They would expect the screen of Takahashi to
display such a menu.
Furthermore, the appellant did not define teletext.
Giving claim 2 its broadest reasonable interpretation, we find
that the claimed limitation of a “teletext display task,”
(Appeal Br. at 15), is broad enough to read on Takahashi’s
display patterns. The characters ACBD and DCBA are displayed
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