Granted Patent
Utility
US 4,942,409 · App. 07/345,610
Drop-on-demand printhead
Inventors:
Anthony D. Paton, Stephen Temple, Mark Shepherd
Patented Case
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Granted: Jul 17, 1990
Filed: Apr 28, 1989
Inventors
Anthony D. Paton
Stephen Temple
Mark Shepherd
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.