Granted Patent
Utility
US 5,215,012 · App. 07/814,755
Ribbon cartridge for printers
Inventors:
Tetsuo Kanno, Kenneth Daniel Seevers, Mamoru Watanabe
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Dec 30, 1991
Inventors
Tetsuo Kanno
Kenneth Daniel Seevers
Mamoru Watanabe
Assignee (at issue)
Lexmark International, 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.