Granted Patent
Utility
US 5,475,213 · App. 08/139,752
Optical information processing element and a light-to-light converting device
Inventors:
Akiteru Fujii, Mitsuru Yoneyama, Tetsuo Murayama
Patented Case
View Patent ↗
Granted: Dec 12, 1995
Filed: Oct 22, 1993
Inventors
Akiteru Fujii
Mitsuru Yoneyama
Tetsuo Murayama
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
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.