Hiroshi Yokoyama

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Kumagaya, JP

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Patents Grantslast 30 patents

Information Patent Grant
Vacuum switch and vacuum switchgear using the same
- Patent number 6,498,314
- Issue date Dec 24, 2002
- Hitachi, Ltd.
- Takuya Miyo
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor package and computer using the package
- Patent number 5,095,359
- Issue date Mar 10, 1992
- Hitachi, Ltd.
- Akira Tanaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor cooling module
- Patent number 5,028,989
- Issue date Jul 2, 1991
- Hitachi, Ltd.
- Yoshio Naganuma
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Vacuum switch and vacuum switchgear using the same
- Publication number 20020134756
- Publication date Sep 26, 2002
- Hitachi, Ltd.
- Takuya Miyo
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Vacuum switch and vacuum switchgear using the same
- Publication number 20010040146
- Publication date Nov 15, 2001
- Takuya Miyo
- H01 - BASIC ELECTRIC ELEMENTS