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Michio Fujiwara
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Hitachinaka, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Train detection system and a train detection method
Patent number
7,200,470
Issue date
Apr 3, 2007
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Transmitter and receiver device for train detection
Patent number
7,027,901
Issue date
Apr 11, 2006
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Train detection system and a train detection method cross reference...
Patent number
6,829,526
Issue date
Dec 7, 2004
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Train detection system and a train detection method
Patent number
6,604,031
Issue date
Aug 5, 2003
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Train detection system
Patent number
6,470,244
Issue date
Oct 22, 2002
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Railway information transmission method and system
Patent number
6,374,165
Issue date
Apr 16, 2002
Hitachi, Ltd.
Kenji Oguma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Train detection system and a train detection method
Patent number
6,317,664
Issue date
Nov 13, 2001
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Train detection system and a train detection method
Patent number
6,230,085
Issue date
May 8, 2001
Hitachi, Ltd.
Kenji Oguma
B61 - RAILWAYS
Information
Patent Grant
Railway information transmission method and system
Patent number
6,230,086
Issue date
May 8, 2001
Hitachi, Ltd.
Kenji Oguma
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Display guide apparatus of elevator and its display method
Patent number
4,995,479
Issue date
Feb 26, 1991
Hitachi, Ltd.
Michio Fujiwara
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
AC type line concentrator
Patent number
4,112,260
Issue date
Sep 5, 1978
Hitachi Denshi Kabushiki Kaisha
Takashi Kurokawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Train detection system and a train detection method
Publication number
20060155433
Publication date
Jul 13, 2006
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Train detection system and a train detection method
Publication number
20050075765
Publication date
Apr 7, 2005
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Train detection system and a train detection method cross reference...
Publication number
20040030467
Publication date
Feb 12, 2004
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Train detection system and a train detection method
Publication number
20020193917
Publication date
Dec 19, 2002
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Train detection system and a train detection method
Publication number
20020029100
Publication date
Mar 7, 2002
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Train detection system and a train detection method
Publication number
20010029412
Publication date
Oct 11, 2001
Kenji Oguma
B61 - RAILWAYS
Information
Patent Application
Railway information transmission method and system
Publication number
20010012977
Publication date
Aug 9, 2001
Kenji Oguma
B61 - RAILWAYS