Granted Patent
Utility
US 6,577,880 · App. 09/619,668
Radio communication method and radio communication system
Inventors:
Kazuhito Ishida, Seiko Shimogama, Toshiaki Kurokawa, Tsutomu Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Jul 19, 2000
Inventors
Kazuhito Ishida
Seiko Shimogama
Toshiaki Kurokawa
Tsutomu Yamaguchi
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.