Granted Patent
Utility
US 4,566,072 · App. 06/355,431
Programmable calculator including means for digitizing the position of an X-Y plotter pen
Inventors:
Alan C. Mortensen, Bradley W. Miller, Franklin Timothy Hickenlooper, David C. Uhlrich, Marl D. Godfrey, Douglas M. Clifford, Rex L. James, Robert E. Watson, John C. Keith
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Mar 8, 1982
Inventors
Alan C. Mortensen
Bradley W. Miller
Franklin Timothy Hickenlooper
David C. Uhlrich
Marl D. Godfrey
Douglas M. Clifford
Rex L. James
Robert E. Watson
John C. Keith
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.