Building construction
United States Patent 2164138

Inventors:
Bernard, London
Publication Date:
06/27/1939
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Assignee:
Bernard, London
Primary Class:
52/407.400
Other Classes:
52/327, 52/774, 52/506.060, 52/378, 52/781
International Classes:
E04B2/60; E04B5/10; E04B2/58