Granted Patent
Utility
US 5,025,271 · App. 07/409,486
Thin film resistor type thermal ink pen using a form storage ink supply
Inventors:
Jeffrey P. Baker, Duong La, Randy Coverstone
Patented Case
View Patent ↗
Granted: Jun 18, 1991
Filed: Sep 18, 1989
Inventors
Jeffrey P. Baker
Duong La
Randy Coverstone
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.