Title:
Earpiece with inflatable sealing means
United States Patent 2535258
US Patent References:
Ear stopper
- - 2246737

Hearing aid earpiece
- - 2430229


Inventors:
Bland, Reginald B.
Publication Date:
12/26/1950
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Assignee:
Bland, Reginald B.
Primary Class:
181/135
Other Classes:
285/97, 128/865
International Classes:
H04R25/00