Granted Patent
Utility
US 4,984,913 · App. 07/217,459
Printer having ribbon wear indicator
Inventors:
Stanley Silverman, Kenneth A. Konechy, Ray G. Van De Walker, Richard S. Newman
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Jul 11, 1988
Inventors
Stanley Silverman
Kenneth A. Konechy
Ray G. Van De Walker
Richard S. Newman
Assignee (at issue)
PRINTRONIX, LLC
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.