Granted Patent
Utility
US 6,454,375 · App. 09/888,716
Pressure based ink level detector and method
Inventors:
Rhonda L. Wilson, Jeffrey Thielman
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Jun 25, 2001
Inventors
Rhonda L. Wilson
Jeffrey Thielman
Assignee (at issue)
Hewlett-Packard 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.