Granted Patent
Utility
US 4,324,151 · App. 06/148,647
Four quadrant control lever restraint
Inventor:
Douglas W. Rudy
Patented Case
View Patent ↗
Granted: Apr 13, 1982
Filed: May 12, 1980
Inventor
Douglas W. Rudy
Assignee (at issue)
International Harvester Company
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.