Title:
Hearing aid earpiece
United States Patent 2430229
US Patent References:
Ear stopper
- - 2246737

Earpiece
- - 1733579

Earpiece for ear phones
- - 1893474

Small receiver
- - 2078385

Earphone
- - 2325590


Inventors:
Kelsey, Elizabeth L.
Publication Date:
11/04/1947
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Assignee:
ZENITH RADIO CORP
Primary Class:
381/338
Other Classes:
181/130, 381/385, 381/328, 381/313
International Classes:
H04R25/00
US Patent References:
1753817Audiphone