Masao Ishihara

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing stay ring for water turbine and pump turbine
- Patent number 4,228,336
- Issue date Oct 14, 1980
- Hitachi, Ltd.
- Tetsuo Okuni
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR