Granted Patent
Utility
US 4,717,191 · App. 06/900,798
Swivel head for grapple
Inventor:
Stanley E. Farmer
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Aug 27, 1986
Inventor
Stanley E. Farmer
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.