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Katsunori Kojima
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Hitachi-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Vacuum switch including vacuum-measurement devices, switchgear usin...
Patent number
6,529,009
Issue date
Mar 4, 2003
Hitachi, Ltd.
Shuuichi Kikukawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Vacuum exhaust element of vacuum switch
Patent number
6,495,786
Issue date
Dec 17, 2002
Hitachi, Ltd.
Masashige Tsuji
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Vacuum switch including vacuum-measurement devices, switchgear usin...
Patent number
6,426,627
Issue date
Jul 30, 2002
Hitachi, Ltd.
Shuuichi Kikukawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Vacuum switch and a vacuum switchgear using the same
Patent number
6,259,051
Issue date
Jul 10, 2001
Hitachi, Ltd.
Toru Tanimizu
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Vacuum switch and a vacuum switchgear using the same
Patent number
6,144,005
Issue date
Nov 7, 2000
Hitachi, Ltd.
Toru Tanimizu
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
MAGNETIC MEASUREMENT SYSTEM AND METHOD FOR MEASURING MAGNETIC FIELD
Publication number
20130057288
Publication date
Mar 7, 2013
Hitachi, Ltd.
Kuniomi OGATA
G01 - MEASURING TESTING
Information
Patent Application
Vacuum switch including vacuum-measurement devices, switchgear usin...
Publication number
20020149372
Publication date
Oct 17, 2002
Hitachi, Ltd.
Shuuichi Kikukawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Vacuum switch including vacuum-measurement devices, switchgear usin...
Publication number
20010004067
Publication date
Jun 21, 2001
Shuuichi Kikukawa
H01 - BASIC ELECTRIC ELEMENTS