Granted Patent
Utility
US 5,910,139 · App. 08/919,607
Numeric keypad simulated on touchscreen
Inventors:
Bruce Robert Cochran, Christopher Michael Eberhardt, John A. Painter
Patented Case
View Patent ↗
Granted: Jun 8, 1999
Filed: Aug 28, 1997
Inventors
Bruce Robert Cochran
Christopher Michael Eberhardt
John A. Painter
Assignee (at issue)
Storz Instrument Co.
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.