Granted Patent
Utility
US 6,686,845 · App. 09/988,680
Driver's arousal level estimating apparatus for vehicle and method of estimating arousal level
Inventor:
Hajime Oyama
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Nov 20, 2001
Inventor
Hajime Oyama
Assignee (at issue)
Fuji Jukogyo Kabushiki Kaisha
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.