Granted Patent
Utility
US 4,810,020 · App. 07/164,516
Hydraulic snubber for grapple and method
Inventor:
Harold Powell
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Mar 7, 1988
Inventor
Harold Powell
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.