Granted Patent
Utility
US 5,087,930 · App. 07/430,213
Drop-on-demand ink jet print head
Inventors:
Joy Roy, John S. Moore
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Nov 1, 1989
Inventors
Joy Roy
John S. Moore
Assignee (at issue)
Tektronix, Inc.
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.