Appeal No. 1999-2028
Application No. 08/769,036
from any suggestion that it would be appropriate to combine
CDPD as disclosed, with Braitberg." We disagree.
We concede that appellants disclose that AMPS voice
transmission and data transmission are difficult to integrate.
However, Braitberg states (column 12, lines 22-34) that the
phone may be a conventional AMPS type phone, but that it "must
be modified to provide a data path for digital data through
connector 48." Braitberg continues that "it will be assumed
that cellular phone 10 contains circuitry to packetize and
depacketize digital data transmitted and received by the
cellular phone." Further, Braitberg indicates (column 12,
lines 58-61) that cellular phone 10 receives RF signals and
"decides internally whether the RF signals contain voiceband
or data/control information." Thus, Braitberg integrates AMPS
voice transmission with data transmission in a single
telephone handset, though Braitberg does not specify CDPD as
the type of data signals.
Appellants admit (specification, page 9, lines 1-6) that
CDPD was "developed to overcome some of the undesirable
effects of transmitting raw digital data over the AMPS
system," and (specification, page 12, lines 27-28) that "CDPD
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