Granted Patent
Utility
US 4,423,932 · App. 06/214,043
Eye fundus observing and photographing optical system
Inventor:
Fumio Takahashi
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Dec 8, 1980
Inventor
Fumio Takahashi
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.