Granted Patent
Utility
US 4,334,553 · App. 06/137,652
Resettable valve spool with kick-out member
Inventors:
Thomas J. Hajek, Jr., Larry W. Lorimor
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Apr 7, 1980
Inventors
Thomas J. Hajek, Jr.
Larry W. Lorimor
Assignee (at issue)
Caterpillar Tractor Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.