Granted Patent
Utility
US 4,320,292 · App. 06/154,407
Coordinate input apparatus
Inventors:
Shigeru Oikawa, Yuzo Katayama, Norio Takato, Takashi Kurokawa
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Aug 22, 1979
Inventors
Shigeru Oikawa
Yuzo Katayama
Norio Takato
Takashi Kurokawa
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.