Etsuo Ohe

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Gas chromatographic apparatus
- Patent number 4,470,832
- Issue date Sep 11, 1984
- Hitachi, Ltd.
- Katuo Sugawara
- G01 - MEASURING TESTING
Information Patent Grant
Fire-retardant insulating oils
- Patent number 4,436,654
- Issue date Mar 13, 1984
- Hitachi, Ltd.
- Etsuo Ohe
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
System for monitoring abnormality of oil-filled electric devices
- Patent number 4,402,211
- Issue date Sep 6, 1983
- Hitachi, Ltd.
- Katuo Sugawara
- G01 - MEASURING TESTING