Granted Patent
Utility
US 4,437,008 · App. 06/256,682
Electron beam control system
Inventors:
Tadahito Matsuda, Masahide Okumura, Hisatake Yokouchi, Susumu Ozasa, Yasuo Kato
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Apr 23, 1981
Inventors
Tadahito Matsuda
Masahide Okumura
Hisatake Yokouchi
Susumu Ozasa
Yasuo Kato
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.