Sound absorbing material
United States Patent 2001916
Inventors:
Jacob, Mazer
Publication Date:
05/21/1935
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Assignee:
Jacob, Mazer
Primary Class:
Other Classes:
52/144, 367/1, 428/316.600, 264/DIG.063, 181/294
International Classes:
C10L1/06; C10L1/00