Granted Patent
Utility
US 5,122,002 · App. 07/775,338
Ribbon cartridge with correction cartridge lock-out circumvention power switch projection
Inventor:
Robert W. Daggs
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Oct 11, 1991
Inventor
Robert W. Daggs
Assignee (at issue)
General Ribbon 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.