IP Library › Granted Patent US 5,259,478
Granted Patent Utility
US 5,259,478 · App. 08/057,992

Pump jack with release mechanism

Inventors: Robert P. Berish, Steven J. Ford
Patented Case View Patent ↗
Granted: Nov 9, 1993 Filed: May 5, 1993
Inventors
Robert P. Berish
Steven J. Ford
Assignee (at issue)
Quality Steel Products, Inc.

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Quick Facts
Patent No.
US 5,259,478
App. No.
08/057,992
Filed
1993-05-05
Granted
1993-11-09
Kind
A