Title:
Production of disk phonograph records
United States Patent 1546573


Inventors:
Edison, Thomas A.
Application Number:
US64136923A
Publication Date:
07/21/1925
Filing Date:
05/25/1923
Assignee:
EDISON INC THOMAS A
Primary Class:
Other Classes:
264/297.4
International Classes:
B29C43/02
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