Granted Patent
Utility
US 4,898,362 · App. 07/304,983
Thrust actuated control for motor operated valve
Inventor:
Robert L. Leon
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Jan 31, 1989
Inventor
Robert L. Leon
Assignee (at issue)
Liberty Technology Center, Inc.
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.