Yoichi Wakabayashi

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Sano, JP

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Patents Grantslast 30 patents

Information Patent Grant
Parabolic antenna dish
- Patent number 4,916,459
- Issue date Apr 10, 1990
- Hitachi, Ltd.
- Hiroshi Kurosawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of producing a fluid pressure reducing device
- Patent number 4,506,423
- Issue date Mar 26, 1985
- Hitachi, Ltd.
- Keiichi Nakamura
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Internally groove forming apparatus for heat exchanging pipes
- Patent number 4,142,392
- Issue date Mar 6, 1979
- Hitachi, Ltd.
- Izumi Ochiai
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...