Granted Patent
Utility
US 5,155,983 · App. 07/690,817
Distance measurement and control using coded sonic signals
Inventors:
Ronald T. Sheehan, Peter G. Mitchell, Charles G. Bagg
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Apr 24, 1991
Inventors
Ronald T. Sheehan
Peter G. Mitchell
Charles G. Bagg
Assignee (at issue)
Ford New Holland, 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.