Miniature headset-microphone adapted for use with a mask
United States Patent 3184556
US Patent References:
Combination ear-mounted microphone and receiver instrument
2904640
Microphones
2717932
Dipole microphone
2485405
Combination ear-mounted microphone and receiver instrument
2904640
Microphones
2717932
Dipole microphone
2485405
Inventors:
Keith, Larkin Wallace
Publication Date:
05/18/1965
Export Citation:
Assignee:
PACIFIC PLANTRONICS INC
Primary Class:
International Classes:
H04M1/05; H04M1/04
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