Appeal No. 2005-0347 Page 3
Application No. 09/993,335
processing, call protocols, subscriber identification and the like are absent in the
GPS handheld device. The cellular acquisition signal receiver allows the GPS
handheld device to have an accurate time of day and/or frequency reference,
thus assisting in GPS signal acquisition and GPS computation. Appellant’s
specification at page 2, the last three lines, through page 3, line 14.
Claim 2 is representative of the claimed invention and is reproduced as
follows:
2. A method comprising:
obtaining a time synchronization signal from a cellular network at a global
positioning system (GPS) handheld device without a subscription to the cellular
network using a front end only capable of receiving signals from said cellular
network;
determining a timing offset responsive to the time synchronization-signal;
determining a time of day responsive to the timing offset without having to
have a subscription to the cellular network; and
processing satellite trajectory data within the GPS handheld device using
the time of day.
References
The references relied on by the Examiner are as follows:
Krasner 6,150,980 Nov. 21, 2000
Kurby et al. (Kurby) 6,323,804 Nov. 27, 2001
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