Process for the formation of recording blanks
United States Patent 1960025

Inventors:
Patterson, Everett M.
Shaw, Albert D.
Publication Date:
05/22/1934
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Assignee:
BELL TELEPHONE LABOR INC
Primary Class:
427/8
Other Classes:
427/398.200, 264/80, 427/224
International Classes:
G11B3/00