Title:
Method of forming internally ribbed tubes
United States Patent 3292408
US Patent References:
/0511900.html
- - 0511900
Method of making grooved sleeves
- - 1985833
Manufacture of metal tubular articles
- - 2392797
/0511900.html
- - 0511900
Method of making grooved sleeves
- - 1985833
Manufacture of metal tubular articles
- - 2392797
Inventors:
Hill, John R.
Publication Date:
12/20/1966
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Export Citation:
Assignee:
BABCOCK & WILCOX CO
Primary Class:
Other Classes:
72/78, 72/348
International Classes:
B21C37/20; B21C37/15
Foreign References:
| DE569686C |