Granted Patent
Utility
US 4,566,762 · App. 06/527,388
Dual focus optical system
Inventor:
Kinya Kato
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Aug 29, 1983
Inventor
Kinya Kato
Assignee (at issue)
Nippon Kogaku K.K.
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.