Granted Patent
Utility
US 4,718,330 · App. 06/339,947
Hydraulic cylinder
Inventor:
Bruce W. Mitton
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: Jan 18, 1982
Inventor
Bruce W. Mitton
Assignee (at issue)
Eltra Corporation
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.