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Electromagnetic opening/closing device |
— |
2015-08-25 |
| 9097766 |
Electromagnetic opening/closing device |
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Electromagnetic opening/closing device |
— |
2015-06-02 |
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Spark plug |
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2015-02-03 |
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Spark plug, and main metal fitting for spark plug |
Hiroaki Nasu |
2014-10-07 |
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Spark plug and metal shell for spark plug |
Hiroaki Nasu |
2014-06-03 |
| 8593046 |
Spark plug having a novel nickel coating for the metal shell |
Hiroaki Nasu |
2013-11-26 |
| 8421324 |
Spark plug, metal shell for spark plug, and method of manufacturing spark plug |
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2013-04-16 |
