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Apparatus for use in forming concrete slabs
United States Patent 3109217
US Patent References:
Concrete form for floors
- - 1807315
Mounting strip for metal tiles
- - 1846196
Hollow core or block for use in concrete structures
- - 1892311
Ceiling mold form
- - 2093401
Molding form for structural material
- - 2101019
Inventors:
Kell, Waldo R.
Publication Date:
11/05/1963
View Patent Images:
Download PDF 3109217
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Assignee:
LAWRENCE PAPER CO
Primary Class:
249/176
Other Classes:
249/DIG.002, 425/DIG.106
International Classes:
B28B7/16
;
B28B7/34
US Patent References:
2823442
Carton form
2881501
Concrete box-form construction