Appeal No. 97-2583
Application 08/156,951
between the two systems. In the response portion of the
examiner’s answer, the examiner focuses on reading the
rendering processor 36 as the “separate” display device driver
and states (answer at 5-6) that as is clearly shown in Longo’s
Figure 5, two such video display device drivers are
simultaneously coupled to the display.
The examiner has incorrectly read Longo as disclosing
separate rendering processors 36 for the host system and for
the control processor. In fact, there is only one rendering
processor 36 which is shared by the host system and by the
control processor 13. See Figures 3 and 4 of Longo. The host
draws on the display through the rendering processor 36 and
the control processor also draws on the display through the
same rendering processor 36. (Column 6, lines 56-65; Column
7, lines 30-41). While Figure 5 apparently shows two
rendering processor symbols 36, evidently their outputs are
connected to different video displays rather than the same
display. The examiner has not set forth a prima facie case
that plural rendering processors are used in Longo, which are
simultaneously coupled to the same display. It appears that
for each display there is only a single rendering processor 36
6
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