Granted Patent
Utility
US 4,420,742 · App. 06/260,090
Scan signal processing system
Inventors:
Masaharu Tadauchi, Kiyohiko Tanno, Taizoh Nakano
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: May 4, 1981
Inventors
Masaharu Tadauchi
Kiyohiko Tanno
Taizoh Nakano
Assignees (at issue)
HITACHI, LTD.
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.