Title:
Hearing aid plastic ear pieces
United States Patent 2939923
US Patent References:
Audiphone earpiece
- - 2188591
Hearing aid earpiece
- - 2430229
Ear insert for earphones
- - 2487038
Hearing aid support
- - 2513746
Adjustable auditory insert
- - 2521414
Audiphone earpiece
- - 2188591
Hearing aid earpiece
- - 2430229
Ear insert for earphones
- - 2487038
Hearing aid support
- - 2513746
Adjustable auditory insert
- - 2521414
Inventors:
Henderson, John D.
Publication Date:
06/07/1960
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Export Citation:
Assignee:
Henderson, John D.
Primary Class:
Other Classes:
63/14.100, 381/328
International Classes:
H04R1/10