Granted Patent
Utility
US 5,440,331 · App. 07/994,384
Printhead servicing apparatus
Inventor:
Jeffrey J. Grange
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Dec 21, 1992
Inventor
Jeffrey J. Grange
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.