Appeal No. 1999-1123
Application No. 08/576,915
According to the examiner (answer, page 4), “Dahlquist et
al. clearly suggest m bit registers (latch 45a) which store m
bit gradation data and have outputs which produce a voltage
applied to a drain and source of a transistor, and a digital
to analog converter (45).” The examiner acknowledges (answer,
page 4) that Dahlquist lacks “n output transistors with
outputs summed together at a summing node, n bit registers
storing n bit correction data and having outputs connected to
control ON or OFF states of the transistors, and a plurality
of sets of n output transistors and a plurality of sets of n
bit registers where the number of sets of n output transistors
being the same as the number of sets of registers.” For such
missing teachings in Dahlquist, the examiner turns to Higuchi.
Based upon the teachings of Dahlquist and Higuchi, the
examiner concludes (answer, page 4) that “[i]t would have been
obvious to one of ordinary skill in the art at the time the
invention was made to combine the Higuchi n output transistors
and n bit registers with the Dahlquist et al. invention and
further to provide LEDs in the Dahlquist et al. invention,
particularly since it is known to drive different energy
sources used for recording (i.e.[,] LEDs and styli) by use of
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