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Minoru Nagai
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Kariya, JP
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last 30 patents
Information
Patent Grant
Ignition plug
Patent number
4,488,081
Issue date
Dec 11, 1984
Nippondenso Co., Ltd.
Ryoji Kondo
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Insulator on spark plug electrode coated with zirconium and vanadiu...
Patent number
4,267,483
Issue date
May 12, 1981
Kabushiki Kaisha Toyota Chuo
Koichi Nakajima
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Spark plug having vanadium oxide islands on central insulator
Patent number
4,250,426
Issue date
Feb 10, 1981
Kabushiki Kaisha Toyota Chuo Kenkyusho and Nippondenso Co., Ltd.
Koichi Nakajima
H01 - BASIC ELECTRIC ELEMENTS