Acoustical material
United States Patent 3286784

Inventors:
Thomas, Mariner
Publication Date:
11/22/1966
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Assignee:
ARMSTRONG CORK CO
Primary Class:
181/289
Other Classes:
428/138, 428/212, 428/311.710
International Classes:
B32B15/08; E04B1/86; E04B1/84
US Patent References:
3020184Sound dampening composition
3058411Ventilated ceiling constructions
Foreign References:
CA547266A