Granted Patent
Utility
US 4,484,119 · App. 06/508,702
Fail-safe machine control system
Inventor:
Archie F. Kerr
Patented Case
View Patent ↗
Granted: Nov 20, 1984
Filed: Jun 28, 1983
Inventor
Archie F. Kerr
Assignee (at issue)
AT&T Technologies Incorporated
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.