Title:
Hearing aid plastic ear pieces
Document Type and Number:
United States Patent 2939923

Inventors:
Henderson, John D.
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Sponsored by:
Flash of Genius
Publication Date:
06/07/1960
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Referenced by:
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Assignee:
Henderson, John D.
Primary Class:
381/330
Other Classes:
63/14.100, 381/328
International Classes:
H04R1/10
US Patent References:
2188591Audiphone earpiece
2430229Hearing aid earpiece
2487038Ear insert for earphones
2513746Hearing aid support
2521414Adjustable auditory insert
2529562Adjustable earpiece for receivers
2573132Hearing aid support


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