Granted Patent
Utility
US 5,059,989 · App. 07/524,197
Thermal edge jet drop-on-demand ink jet print head
Inventors:
Jerome M. Eldridge, Gary S. Keller, Francis Chee-Shuen Lee, Graham Olive
Patented Case
View Patent ↗
Granted: Oct 22, 1991
Filed: May 16, 1990
Inventors
Jerome M. Eldridge
Gary S. Keller
Francis Chee-Shuen Lee
Graham Olive
Assignee (at issue)
Lexmark International, 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.