Granted Patent
Utility
US 4,723,639 · App. 06/900,797
Rotary hydraulic snubber with a bypass valve
Inventor:
Emory D. Hungerford
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Aug 27, 1986
Inventor
Emory D. Hungerford
Assignee (at issue)
ESCO GROUP LLC
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.