Fireproof wall board
United States Patent 1905541

Inventors:
Wiener, John A.
Harmon, John B.
Publication Date:
04/25/1933
Export Citation:
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Assignee:
Wiener, John A.
Harmon, John B.
Primary Class:
162/159
Other Classes:
428/921, 106/DIG.003, 162/181.700, 162/181.400
International Classes:
D21J1/00
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