Appeal No. 2001-0526 Page 6
Application No. 08/960,236
figure 2C includes performance of a touch down of the write tip 4
on the display at a predetermined location X0, Y0, Z0 during
calibration. In step 232 the user touches down the erase tip 4'
on the display 54. In step 236, the output from the sphere
antenna 29' is recorded. Verrier further discloses (col. 12,
lines 27-30) “measuring a first radiative pickup signal strength
in said first set of input signals from said first antenna in
said write end while mechanically contacting said digitizing
display.”
From the disclosure of Verrier that the signals radiated
from the conductors 56, 58 represent the relative X-Y position of
the stylus and the Z separation over the tablet 54, we find a
suggestion that the tablet is sensitive to position over the
tablet, as opposed to being sensitive to contact with the tablet.
However, from the disclosuree of Verrier that the tablet
conductors can detect a touch down of the stylus 20 on the tablet
54, and radiate electromagnetic signals which can be picked up by
antenna 29 of the position detecting branch, we find that the
surface of the tablet (see figure 5) is contact sensitive to a
touch down of the stylus. In addition, we find that the contact
point configuration is the configuration of the contact of the
stylus contact portions 38, 38' with the surface of the tablet at
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Last modified: November 3, 2007