Kouki Yotsuya

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Chiyoda, JP

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Patents Grantslast 30 patents

Information Patent Grant
Device for purifying exhaust gas of internal combustion engine
- Patent number 5,902,557
- Issue date May 11, 1999
- Nippon Steel Corporation
- Kouki Yotsuya
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Semi-oval shaped carrier having excellent thermal stress resistance...
- Patent number 5,304,351
- Issue date Apr 19, 1994
- Nippon Steel Corporation
- Takashi Tanaka
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES