Granted Patent
Utility
US 4,145,121 · App. 05/710,961
Light modulator
Inventors:
Susumu Hata, Kenji Kajiyama, Yoshihiko Mizushima
Patented Case
View Patent ↗
Granted: Mar 20, 1979
Filed: Aug 3, 1976
Inventors
Susumu Hata
Kenji Kajiyama
Yoshihiko Mizushima
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.