Method of making building panels
United States Patent 2266510

Inventors:
Pottinger, Robert A.
Publication Date:
12/16/1941
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Assignee:
Mabel, Pottinger I.
Primary Class:
264/276
Other Classes:
264/336, 52/315, 264/277, 52/389, 249/84
International Classes:
B28B19/00; E04F13/14