Granted Patent
Utility
US 5,574,489 · App. 08/221,318
Ink cartridge system for ink-jet printer
Inventors:
Bruce Cowger, Ron Prevost
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Mar 30, 1994
Inventors
Bruce Cowger
Ron Prevost
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.