Granted Patent
Utility
US 4,646,990 · App. 06/830,154
Magnetic roll sensor calibrator
Inventor:
William C. Cleveland, Jr.
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Feb 18, 1986
Inventor
William C. Cleveland, Jr.
Assignee (at issue)
Ford Aerospace & Communications 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.