Granted Patent
Utility
US 4,425,484 · App. 06/285,898
Encoded keyboard switch
Inventor:
Kazutoyo Fukukura
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Jul 23, 1981
Inventor
Kazutoyo Fukukura
Assignee (at issue)
AMP LLC
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.