Granted Patent
Utility
US 6,567,074 · App. 09/918,222
Operation apparatus using operating unit having plural push-buttons formed integrally therewith
Inventors:
Tetsu Numata, Toshio Furudate
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Jul 30, 2001
Inventors
Tetsu Numata
Toshio Furudate
Assignee (at issue)
ALPS ELECTRIC CO., LTD.
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.