H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 1/72 (2006.01) B60R 11/02 (2006.01) H04M 1/00 (2006.01) H04M 1/05 (2006.01) H04M 1/60 (2006.01) H04Q 7/32 (2006.01)
Patent
CA 2265145
A communication system for telephone. The system uses infrared or radio wave as a medium for transmitting voice signal from a telephone to a receiver earphone worn by the user. and then uses a microphone to pick up voice messages from the user. Hence, hands-free telephone conversation is possible.
Cotron Corporation
Smart & Biggar
LandOfFree
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