Hiroshi Wachi

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Hitachi, JP

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Patents Grantslast 30 patents

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Semiconductor module and cooling device of the same
- Patent number 4,996,589
- Issue date Feb 26, 1991
- Hitachi, Ltd.
- Ryoichi Kajiwara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Integrated circuit device
- Patent number 4,809,058
- Issue date Feb 28, 1989
- Hitachi, Ltd.
- Takao Funamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Sealed-type liquid cooling device with expandable bellow for semico...
- Patent number 4,740,866
- Issue date Apr 26, 1988
- Hitachi, Ltd.
- Ryoichi Kajiwara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Two electrode welding with different currents supplied to the elect...
- Patent number 4,436,982
- Issue date Mar 13, 1984
- Hitachi, Ltd.
- Satoshi Kokura
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method and apparatus for automatically controlling arc welding
- Patent number 4,280,137
- Issue date Jul 21, 1981
- Hitachi, Ltd.
- Eiji Ashida
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR