Granted Patent
Utility
US 4,753,545 · App. 07/050,458
Replaceable ribbon cartridge for printers
Inventors:
Hermann Kohlhage, Ruprecht Flugge
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: May 14, 1987
Inventors
Hermann Kohlhage
Ruprecht Flugge
Assignee (at issue)
Nixdorf Computer AG
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.