Spirally ribbed reinforcing bar for concrete
United States Patent 3335539
US Patent References:
/0891234.html
- - 0891234

/1076192.html
- - 1076192

Structural bar
- - 1339226

Concrete reinforcing bar
- - 2374827

Reinforcing bar
- - 2377980


Inventors:
Stefan, Soretz
Publication Date:
08/15/1967
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Assignee:
TOR ISTEG STEEL CORP
Primary Class:
52/853
International Classes:
B21D11/15; E04C5/03; B21D11/00; E04C5/01
US Patent References:
2552364Reinforcing bar or rod
Foreign References:
BE511786A
BE559836A
FR1166624A
FR1181961A