Granted Patent
Utility
US 4,841,310 · App. 07/176,118
High performance ink jet print head for use in a high speed printer
Inventor:
Arthur R. Hoffman
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Mar 31, 1988
Inventor
Arthur R. Hoffman
Assignee (at issue)
International Business Machines Corporation
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.