Granted Patent
Utility
US 4,735,532 · App. 06/946,231
Spindle with positive lock drawbar
Inventor:
Carl E. Hunt
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Dec 24, 1986
Inventor
Carl E. Hunt
Assignee (at issue)
GTE Valeron Corporation
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.