Granted Patent
Utility
US 4,848,895 · App. 06/820,793
Automatic eye refractive power measuring apparatus
Inventors:
Yasuo Kato, Kiwami Horiguchi, Shinji Wada, Ikuo Kitao
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Jan 22, 1986
Inventors
Yasuo Kato
Kiwami Horiguchi
Shinji Wada
Ikuo Kitao
Assignee (at issue)
Tokyo Kogaku Kikai 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.