Granted Patent
Utility
US 5,646,664 · App. 08/374,363
Ink container valving
Inventor:
Norman E. Pawlowski, Jr.
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Jan 18, 1995
Inventor
Norman E. Pawlowski, Jr.
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.