Granted Patent
Utility
US 4,590,482 · App. 06/561,604
Nozzle test apparatus and method for thermal ink jet systems
Inventors:
Robert R. Hay, Paul R. Spencer
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Dec 14, 1983
Inventors
Robert R. Hay
Paul R. Spencer
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.