Concrete slab construction
United States Patent 2154390

Inventors:
William, Akers Charles
Publication Date:
04/11/1939
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Assignee:
William, Akers Charles
Primary Class:
52/371
Other Classes:
52/252, 52/220.200, 52/318, 52/320, 52/337, 52/396.030, 52/372
International Classes:
E04B5/19; E04B5/17