Granted Patent
Utility
US 4,368,385 · App. 06/215,614
Optoelectronic switches
Inventors:
Hiroshi Kanbe, Elmer H. Hara
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Dec 12, 1980
Inventors
Hiroshi Kanbe
Elmer H. Hara
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.