Granted Patent
Utility
US 4,831,389 · App. 07/136,060
Off board ink supply system and process for operating an ink jet printer
Inventor:
C. S. Chan
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Dec 21, 1987
Inventor
C. S. Chan
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.