Method of and apparatus for the construction of walls and similar forms
United States Patent 2116557
Inventors:
Billner, Karl P.
Publication Date:
05/10/1938
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Assignee:
Billner, Karl P.
Primary Class:
Other Classes:
52/383, 425/85, 264/DIG.078, 264/253, 52/405.300
International Classes:
E04B2/84