Spring assembly
United States Patent 3176325
US Patent References:
/0442236.html
- - 0442236

/0442237.html
- - 0442237

Double hinged inner spring unit
- - 3099843


Inventors:
Mac, Levine
Publication Date:
04/06/1965
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Assignee:
WEBSTER SPRING CO
Primary Class:
5/249
International Classes:
A47C27/07; A47C27/04