Granted Patent
Utility
US 6,554,382 · App. 10/100,646
Ink container electrical resistance ink level sensing mechanism and method for determining ink level information
Inventor:
Roger R. Sleger
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Mar 19, 2002
Inventor
Roger R. Sleger
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.