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Vehicular hands-free telephone system

  • US 4,905,270 A
  • Filed: 12/14/1988
  • Issued: 02/27/1990
  • Est. Priority Date: 12/18/1987
  • Status: Expired due to Term
First Claim
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1. A vehicular hands-free telephone apparatus comprisinga microphone for converting an acoustic signal to an electrical signal,an FM transmitter for generating a frequency-modulated radio signal in response to the output of said microphone,a transmitting antenna for transmitting in a vehicle said radio signal generated from said FM transmitter,a solar battery for converting light energy to electrical energy and providing operation power to said FM transmitter, said solar battery being mounted on a windshield of said vehicle,a receiving antenna for receiving said radio signal transmitted from said transmitting antenna,a receiver for receiving and frequency-demodulating said radio signal received by said receiving antenna, anda transceiver for transmitting the output of receiver outside of said vehicle,wherein said microphone, transmitting antenna and FM transmitter are built in a sun visor of said vehicle.

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