Granted Patent
Utility
US 4,480,932 · App. 06/422,936
Keyboard having rotationally positionable indicia for indicating type font in use
Inventor:
Frederick P. Willcox
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Sep 24, 1982
Inventor
Frederick P. Willcox
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.