Granted Patent
Utility
US 6,428,222 · App. 09/710,492
Sensor for identifying marks on a ribbon
Inventor:
Matthew K. Dunham
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Nov 10, 2000
Inventor
Matthew K. Dunham
Assignee (at issue)
Fargo Electronics, 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.