Helical fin wrapping machine
United States Patent 2152437
Inventors:
Lear, Joseph D.
Publication Date:
03/28/1939
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Assignee:
FEDDERS MFG CO INC
Primary Class:
Other Classes:
228/5.100, 72/137, 82/148, 29/726, 29/33G
International Classes:
B21C37/26; B21C37/15