Granted Patent
Utility
US 4,273,486 · App. 05/801,621
Winch and chain attachment assembly
Inventor:
Richard A. Tatina
Patented Case
View Patent ↗
Granted: Jun 16, 1981
Filed: May 31, 1977
Inventor
Richard A. Tatina
Assignee (at issue)
Portec, 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.