Granted Patent
Utility
US 4,305,572 · App. 06/107,755
Return assembly for a swivable sheave
Inventor:
Jeremy F. Elliot
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Dec 27, 1979
Inventor
Jeremy F. Elliot
Assignee (at issue)
Dresser 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.