Atsuya Kamada

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Kamakura, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of and apparatus for fabrication of spiral fin
- Patent number 4,429,558
- Issue date Feb 7, 1984
- Hitachi, Ltd.
- Hiroya Murakami
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method of jointing pipes by friction welding
- Patent number 4,331,280
- Issue date May 25, 1982
- Hitachi, Ltd.
- Takao Terabayashi
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR