Granted Patent
Utility
US 4,817,658 · App. 07/234,483
Automatic valve actuator
Inventor:
Jerry L. Lyons
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Aug 19, 1988
Inventor
Jerry L. Lyons
Assignee (at issue)
Essex Industries, 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.