Granted Patent
Utility
US 5,736,992 · App. 08/518,847
Pressure regulated free-ink ink-jet pen
Inventor:
Norman E. Pawlowski, Jr.
Patented Case
View Patent ↗
Granted: Apr 7, 1998
Filed: Aug 24, 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.