Granted Patent
Utility
US 5,262,797 · App. 07/763,889
Monitoring and controlling quality of pen markings on plotting media
Inventors:
Robert A. Boeller, Thomas J. Halpenny, Josep Tarradas, Isidre Rosello Martos, Robert W. Beauchamp
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Sep 20, 1991
Inventors
Robert A. Boeller
Thomas J. Halpenny
Josep Tarradas
Isidre Rosello Martos
Robert W. Beauchamp
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.