Granted Patent
Utility
US 6,633,323 · App. 09/973,238
Visual check window for printing performance and/or toner status
Inventor:
Richard F. Beaufort
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Oct 9, 2001
Inventor
Richard F. Beaufort
Assignee (at issue)
Hewlett-Packard Development Company, L.P.
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.