Granted Patent
Utility
US 4,318,451 · App. 06/153,400
Dual function remote steering control
Inventor:
Richard K. Liggett
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: May 27, 1980
Inventor
Richard K. Liggett
Assignee (at issue)
Warner & Swasey
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.