Granted Patent
Utility
US 4,437,156 · App. 06/227,019
Programmable calculator
Inventors:
Chris J. Christopher, Fred Wenninger, Jr., Donald E. Morris, Wayne F. Covington, Jerry B. Folsom, Joseph W. Beyers, John H. Nairn, Jeffrey C. Osborne
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jan 21, 1981
Inventors
Chris J. Christopher
Fred Wenninger, Jr.
Donald E. Morris
Wayne F. Covington
Jerry B. Folsom
Joseph W. Beyers
John H. Nairn
Jeffrey C. Osborne
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.