Hollow metal shaft and manufacture of same
United States Patent 2100307

Inventors:
Mcminn, Wiley W.
Publication Date:
11/23/1937
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Assignee:
Mcminn, Wiley W.
Primary Class:
473/316
Other Classes:
428/592, 138/134, 428/34.100, 228/145, 428/585, 156/214, 473/566
International Classes:
B21C37/12; B21C37/16; B21C37/18; B21C37/06; B21C37/15