Composite beam
United States Patent 3238690
US Patent References:
/0491092.html
- - 0491092

/1269140.html
- - 1269140

Reinforced wooden beam
- - 1368594

Structural element
- - 1473842

Manufacture of reinforced paper and product
- - 2739092


Inventors:
Burdette, Wilkins William
Publication Date:
03/08/1966
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Assignee:
Reinforced, Plastic Container C.
Primary Class:
52/847
Other Classes:
52/423, 156/313, 52/843
International Classes:
E04C3/29