Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9660422 | Spark plug for voltage resistance and suppression of side sparking and oxidation | Hiroaki Kuki | 2017-05-23 |
| 8288931 | Spark plug having a center electrode and a ground electrode provided with no noble metal member | Hiroaki Masuda | 2012-10-16 |
| 8217561 | Spark plug having laminated ground electrode | Tomoaki Kato, Akira Suzuki | 2012-07-10 |
| 8067882 | Sealing member for spark plug | Tomoaki Kato | 2011-11-29 |
| 7477006 | Spark plug for internal combustion engine and method of manufacturing the same | Jiro Kyuno | 2009-01-13 |