Sound-insulating plate, sheet, or slab
United States Patent 1628090
Inventors:
Johannes, Weiss
Publication Date:
05/10/1927
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Assignee:
Johannes, Weiss
Primary Class:
Other Classes:
404/32, 267/141, D05/53, 217/53, D25/157
International Classes:
E04B1/86; E04B1/84