Granted Patent
Utility
US 4,352,578 · App. 06/185,105
Paperboard ribbon cartridge
Inventors:
Norman D. Dunning, Franklin D. Jervis, Kenneth W. Taylor
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Sep 8, 1980
Inventors
Norman D. Dunning
Franklin D. Jervis
Kenneth W. Taylor
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.