Granted Patent
Utility
US 4,384,766 · App. 06/270,149
Optical system for copying
Inventor:
Mitsuhiro Tokuhara
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Jun 3, 1981
Inventor
Mitsuhiro Tokuhara
Assignee (at issue)
CANON 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.