Appeal No. 2001-0945
Application No. 08/908,129
that position as our own. Indeed, the examiner’s answer includes
an exceptionally thorough and cogent analysis and treatment of
the issues before us. For that reason, we offer only a few
additional comments for emphasis.
Initially, we note that appellants stipulate on page 12 of
their brief, and on page 5 of their specification, that “Error
Diffusion” techniques are a well known form of frequency
modulation screening. As noted by the examiner, Stoffel (pp.
1901-07; particularly page 1907) quite clearly discloses that
error diffusion techniques may be used for continuous tone
pictorial reproduction. In the same vein, we refer to Table I on
page 1909 of Stoffel.
In our opinion, Stoffel also makes it abundantly clear that
the techniques and algorithms discussed in the article, such as
“error diffusion,” are generally applicable to lithography as
well as other binary output/printing systems; lithography being
specifically mentioned on pages 1898 and 1899. Appellants’
arguments to the contrary are unpersuasive since argument by
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