Seiichi Sakai

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for diagnosing oil-filled electric apparatus
- Patent number 4,502,320
- Issue date Mar 5, 1985
- Hitachi, Ltd.
- Seiichi Sakai
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for detecting gas components in oil in oil-fil...
- Patent number 4,444,040
- Issue date Apr 24, 1984
- Hitachi, Ltd.
- Seiichi Sakai
- G01 - MEASURING TESTING