Ryuzaburo Maruyama

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Fujisawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Spark plug for internal combustion engine
- Patent number 4,419,601
- Issue date Dec 6, 1983
- Nissan Motor Company, Limited
- Kyugo Hamai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ignition plug for internal combustion engine
- Patent number 4,354,136
- Issue date Oct 12, 1982
- Nissan Motor Company, Limited
- Kyugo Hamai
- H01 - BASIC ELECTRIC ELEMENTS