Spring
United States Patent 3170447

Inventors:
Svoren, Louis J.
Eimeren Jr., Eugene Van C.
Publication Date:
02/23/1965
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Assignee:
WALKER MFG CO
Primary Class:
Other Classes:
55/417, 48/192, 219/207, 55/510
International Classes:
F01M13/02; F02B77/10; F01M13/00