Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8371889 | Spark plug manufacturing method and spark plug manufacturing apparatus | Keisuke Kure | 2013-02-12 |
| 7581998 | Method for regulating aground electrode position in spark plug | Shigeo Fujita, Shinichiro Mitsumatsu | 2009-09-01 |