Granted Patent
Utility
US 6,157,837 · App. 08/786,480
Mobile communication system, network and mobile station
Inventors:
Yasuhiro Kato, Akihiro Maebara, Ichiro Okajima, Kazuo Sugiyama, Koji Sasada
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Jan 21, 1997
Inventors
Yasuhiro Kato
Akihiro Maebara
Ichiro Okajima
Kazuo Sugiyama
Koji Sasada
Assignee (at issue)
NTT MOBILE COMMUNICATIONS NETWORK, INC.
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.