Granted Patent
Utility
US 5,122,812 · App. 07/637,387
Thermal inkjet printhead having driver circuitry thereon and method for making the same
Inventors:
Ulrich Hess, Duane Fasen
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Jan 3, 1991
Inventors
Ulrich Hess
Duane Fasen
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.