Granted Patent
Utility
US 6,731,621 · App. 09/261,181
Mobil communication system for providing IP packet communications and method for routing IP packets
Inventors:
Mika Mizutani, Susumu Matsui, Toshiya Ouchi, Haruo Shibata, Koji Hirayama, Keisuke Shirai
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Mar 3, 1999
Inventors
Mika Mizutani
Susumu Matsui
Toshiya Ouchi
Haruo Shibata
Koji Hirayama
Keisuke Shirai
Assignee (at issue)
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.