Granted Patent
Utility
US 5,206,721 · App. 07/490,469
Television conference system
Inventors:
Youichi Ashida, Ryusaku Imai, Yuji Yoshida, Toshihiro Homma, Hitoshi Sato, Hitoshi Ishiguro, Hiroaki Natori, Masakazu Yamaguchi
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Mar 8, 1990
Inventors
Youichi Ashida
Ryusaku Imai
Yuji Yoshida
Toshihiro Homma
Hitoshi Sato
Hitoshi Ishiguro
Hiroaki Natori
Masakazu Yamaguchi
Assignee (at issue)
Fujitsu Limited
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.