Title:
Sound gatherer
United States Patent 2537201
US Patent References:
Sound-wave catcher
- - 1708257

Ear trumpet
- - 1761666


Inventors:
Daniele, Amfitheatrof
Publication Date:
01/09/1951
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Assignee:
Daniele, Amfitheatrof
Primary Class:
181/136
Other Classes:
D14/205
International Classes:
A61F11/00