Granted Patent
Utility
US 4,275,293 · App. 06/108,797
Jam detection and recovery system
Inventor:
John M. Chambors
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Dec 31, 1979
Inventor
John M. Chambors
Assignee (at issue)
Burroughs, 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.