Granted Patent
Utility
US 5,150,118 · App. 07/629,059
Interchangeable coded key pad assemblies alternately attachable to a user definable keyboard to enable programmable keyboard functions
Inventors:
Thomas W. Finkle, Ralph M. Swanson
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Dec 14, 1990
Inventors
Thomas W. Finkle
Ralph M. Swanson
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.