Acoustic device
United States Patent 2002390

Inventors:
Crosley Jr., Powel
Henry, Gest
Publication Date:
05/21/1935
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Assignee:
CROSLEY RADIO CORP
Primary Class:
455/149
Other Classes:
181/156, 381/17, 181/144, 381/89, 312/7.100
International Classes:
H04R1/40