Phonograph record
United States Patent 2028126

Inventors:
Warren, Richard F.
Publication Date:
01/14/1936
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Assignee:
CARBIDE & CARBON CHEM CORP
Primary Class:
428/65.900
Other Classes:
523/174, 525/239, 369/286, 525/134, 524/365, 525/222, 525/143, 260/998.160, 525/144, 369/288, 36/77M
International Classes:
G11B3/70; G11B3/00