Granted Patent
Utility
US 4,359,288 · App. 06/159,555
Single pass ribbon cartridge for impact printers having means to prevent incorrect insertion
Inventors:
Robert L. Bullock, Billy D. Purcell, William Joseph Thornhill, Edward E. Toutant
Patented Case
View Patent ↗
Granted: Nov 16, 1982
Filed: Jun 16, 1980
Inventors
Robert L. Bullock
Billy D. Purcell
William Joseph Thornhill
Edward E. Toutant
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.