Appeal No. 2000-0957
Application 06/344,455
grid on the display as shown in figure 7. The "fixed
distance of approximately 500,000 feet between the
transmitter and receiver . . . [is] represented by an
oscilloscope scanning line of four inches" (col. 3,
lines 38-41); thus, the location of the transmitter is
implicitly shown on the display. The display is used to
determine the altitude y to the target by measuring the
vertical distance of the spot using the grid and is used to
determine the slant range S to the target by measuring the
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distance along a scanning line from the intersection point
of the scanning lines to the spot or measuring the
horizontal and vertical distances on the grid and computing
the length of the hypotenuse.
Claim 1
Appellants argue (Br14-15): "The PPI display of Harris
is not 'used' to determine the slant range and altitude; it
is merely viewed. . . . It is applicant's position that
merely viewing the display is not a use of the display.
'Use' of the display requires some manipulation of the
display, as in the case of the present invention." The
Examiner responds (EA3): "The conventional reference
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