IP Library › Granted Patent US 4,493,631
Granted Patent Utility
US 4,493,631 · App. 06/532,419

Apparatus for producing variable-rate spring

Inventors: J. Robert Dieckmann, Michael L. Lauber, Mark R. Roodvoets
Patented Case View Patent ↗
Granted: Jan 15, 1985 Filed: Sep 15, 1983
Inventors
J. Robert Dieckmann
Michael L. Lauber
Mark R. Roodvoets
Assignee (at issue)
The Firestone Tire & Rubber Company

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Quick Facts
Patent No.
US 4,493,631
App. No.
06/532,419
Filed
1983-09-15
Granted
1985-01-15
Kind
A