Granted Patent
Utility
US 4,568,210 · App. 06/595,063
Reversible ribbon cartridge
Inventor:
David J. Privitera
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Mar 30, 1984
Inventor
David J. Privitera
Assignee (at issue)
Wang Laboratories, 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.