Granted Patent
Utility
US 5,428,413 · App. 08/001,224
Eye direction detecting apparatus
Inventor:
Osamu Shindo
Patented Case
View Patent ↗
Granted: Jun 27, 1995
Filed: Jan 6, 1993
Inventor
Osamu Shindo
Assignee (at issue)
Asaki Kogyo 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.