Ear-insert microphone
United States Patent 3258533
US Patent References:
Communicating system
- - 2535063
Receiving apparatus for radio signals
- - 2544102
Ear protector and communication equipment
- - 2946862
Electronic sound transmitting device
- - 2950357
Ear insert hearing aid
- - 2971065
Communicating system
- - 2535063
Receiving apparatus for radio signals
- - 2544102
Ear protector and communication equipment
- - 2946862
Electronic sound transmitting device
- - 2950357
Ear insert hearing aid
- - 2971065
Inventors:
Bredon, Alan D.
Publication Date:
06/28/1966
View Patent Images:
Export Citation:
Assignee:
SPACELABS INC
Primary Class:
Other Classes:
D14/223, 381/151
International Classes:
H04B5/06; H04R1/08; H04R1/10; H04R1/14; H04B5/00; H04R1/00
US Patent References: