Granted Patent
Utility
US 5,677,718 · App. 08/327,591
Drop-on-demand ink jet print head having improved purging performance
Inventors:
Clark W. Crawford, Ronald F. Burr
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Oct 24, 1994
Inventors
Clark W. Crawford
Ronald F. Burr
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.