Granted Patent
Utility
US 4,746,935 · App. 06/801,030
Multitone ink jet printer and method of operation
Inventor:
Ross R. Allen
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Nov 22, 1985
Inventor
Ross R. Allen
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.