Granted Patent
Utility
US 4,690,516 · App. 06/658,990
Photographing lens barrel provided with a catadioptric optical system
Inventor:
Hideo Kanno
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Oct 10, 1984
Inventor
Hideo Kanno
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.