Granted Patent
Utility
US 4,232,219 · App. 06/015,615
Photosensor
Inventors:
Hideaki Yamamoto, Toshihisa Tsukada, Eiichi Maruyama, Hiroya Inagaki
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Feb 27, 1979
Inventors
Hideaki Yamamoto
Toshihisa Tsukada
Eiichi Maruyama
Hiroya Inagaki
Assignees (at issue)
Nippon Telegraph and Telephone Public Corporation
HITACHI, LTD.
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.