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Hisao Ogawa
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Hitachi-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical communication method, optical linking device and optical co...
Patent number
7,558,483
Issue date
Jul 7, 2009
Hitachi, Ltd.
Hiroshi Arita
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Radio network system
Patent number
6,934,516
Issue date
Aug 23, 2005
Hitachi, Ltd.
Tomoyuki Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication method, optical linking device and optical co...
Patent number
6,782,202
Issue date
Aug 24, 2004
Hitachi, Ltd.
Hiroshi Arita
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Radio network system
Patent number
6,625,421
Issue date
Sep 23, 2003
Hitachi, Ltd.
Tomoyuki Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication method, optical linking device and optical co...
Patent number
6,249,363
Issue date
Jun 19, 2001
Hitachi, Ltd.
Hiroshi Arita
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data transmission method and system thereof
Patent number
5,497,374
Issue date
Mar 5, 1996
Hitachi, Ltd.
Hisayuki Maruyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission method and system thereof
Patent number
5,426,638
Issue date
Jun 20, 1995
Hitachi, Ltd.
Hisayuki Maruyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for controlling dual bus system
Patent number
5,345,566
Issue date
Sep 6, 1994
Hitachi, Ltd.
Masayuki Tanji
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
Optical communication method, optical linking device and optical co...
Publication number
20040268011
Publication date
Dec 30, 2004
Hiroshi Arita
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Radio network system
Publication number
20030194972
Publication date
Oct 16, 2003
Hitachi, Ltd
Tomoyuki Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical communication method, optical linking device and optical co...
Publication number
20010028487
Publication date
Oct 11, 2001
Hitachi, Ltd
Hiroshi Arita
G06 - COMPUTING CALCULATING COUNTING