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Title:
Sound translating device
United States Patent 2037187
Inventors:
Wente, Edward C.
Publication Date:
04/14/1936
Export Citation:
Click for automatic bibliography generation
Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
381/343
Other Classes:
181/159
International Classes:
H04R1/30
;
H04R1/22
View Patent Images:
Download PDF 2037187
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