Granted Patent
Utility
US 4,698,644 · App. 06/923,055
Drop-on-demand ink jet print head
Inventors:
Gary A. Drago, Walter F. Baier, Francis Chee-Shuen Lee, Ross N. Mills, Horst G. Mossbrugger
Patented Case
View Patent ↗
Granted: Oct 6, 1987
Filed: Oct 27, 1986
Inventors
Gary A. Drago
Walter F. Baier
Francis Chee-Shuen Lee
Ross N. Mills
Horst G. Mossbrugger
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.