Granted Patent
Utility
US 4,258,249 · App. 06/080,260
Stylus for tabulating device
Inventor:
John E. Ahmann
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Oct 1, 1979
Inventor
John E. Ahmann
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.