Dual mode mobile phone operating as a two-way radio
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United States of America Patent
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-
Jul 2, 2002
Grant Date -
N/A
app pub date -
Feb 1, 1999
filing date -
Feb 1, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dual mode transmitter/receiver adds two-way radio functionality to a frequency division duplex mobile phone. The dual mode transmitter/receiver allows short-range and low-power communication between similarly equipped phones. In the two-way radio mode, the dual mode mobile phone transmits and receives at a frequency between the normal mobile transmit and receive frequency bands so that a number of transmitter/receiver components are utilized for both normal and two-way radio communication.
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