Granted Patent
Utility
US 4,810,083 · App. 07/188,380
Binocular indirect ophthalmoscope
Inventors:
Kohichi Okada, Kazutoshi Takagi
Patented Case
View Patent ↗
Granted: Mar 7, 1989
Filed: Apr 29, 1988
Inventors
Kohichi Okada
Kazutoshi Takagi
Assignees (at issue)
KABUSHIKIKAISHA RAIFU
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.