Vehicular hands-free telephone system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 27, 1990
Grant Date -
N/A
app pub date -
Dec 14, 1988
filing date -
Dec 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A voice of user is picked up by a microphone built in a sun visor of a vehicle. The output of microphone is frequency-modulated by an FM transmitter powered by a solar battery and transmitted through a transmitting antenna in a vehicle. The frequency-modulated radio signal is received and demodulated by a receiver with a receiving antenna. The received signal is further transmitted outside of the vehicle through a transceiver.
First Claim
Family
International Classification(s)
Cited Art Landscape
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