Title:
Vacuum mold for molding concrete and the like
United States Patent 2474721
US Patent References:
Method of and apparatus for the construction of walls and similar forms
- - 2116557
Method of and apparatus for the construction of walls and similar forms
- - 2116557
Inventors:
Billner, Karl P.
Publication Date:
06/28/1949
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Export Citation:
Assignee:
VACUUM CONCRETE INC
Primary Class:
Other Classes:
425/DIG.119
International Classes:
B28B7/46; B28B7/40