Granted Patent
Utility
US 5,208,980 · App. 07/815,396
Method of forming tapered orifice arrays in fully assembled ink jet printheads
Inventor:
Donald J. Hayes
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Dec 31, 1991
Inventor
Donald J. Hayes
Assignee (at issue)
Compaq Computer 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.