Granted Patent
Utility
US 4,229,112 · App. 05/972,596
Random stuffer ribbon cartridge with improved ribbon exit control
Inventor:
John O. Schaefer
Patented Case
View Patent ↗
Granted: Oct 21, 1980
Filed: Dec 22, 1978
Inventor
John O. Schaefer
Assignee (at issue)
International Business Machines 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.