Hearing aid apparatus
United States Patent 3327807
US Patent References:
Audiphone
- - 2179615

Head support for telephones
- - 2535269

Hearing aid
- - 2882348

Phone holder
- - 3091670


Inventors:
Mullin, Clayton D.
Publication Date:
06/27/1967
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Assignee:
TEXTRON INC
Primary Class:
181/129
Other Classes:
381/330
International Classes:
H04R25/00