Title:
Ear mounted hearing aid device
United States Patent 2874231
US Patent References:
Air conduction hearing aid having adjacently mounted microphone and receiver
- - 2506981
Earphone
- - 2528811
Microphone
- - 2718563
Hearing aid, construction and support therefor
- - 2765373
Hearing aid
- - 2787670
Air conduction hearing aid having adjacently mounted microphone and receiver
- - 2506981
Earphone
- - 2528811
Microphone
- - 2718563
Hearing aid, construction and support therefor
- - 2765373
Hearing aid
- - 2787670
Inventors:
Wallace, Frank B.
Publication Date:
02/17/1959
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Export Citation:
Assignee:
Wallace, Frank B.
Primary Class:
Other Classes:
381/328, 381/373
International Classes:
H04R25/02