Granted Patent
Utility
US 5,691,580 · App. 08/447,328
Button interface for state machine
Inventor:
Kevin A. Shelby
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: May 22, 1995
Inventor
Kevin A. Shelby
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.