Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8633418 | Spark plug manufacturing method | Tomoaki Kato, Yuichi Nakano | 2014-01-21 |
| 8427038 | Spark plug and process for producing same | Tomoaki Kato | 2013-04-23 |
| 8399799 | Method for manufacturing spark plug | Tomoaki Kato | 2013-03-19 |
| 7666047 | Method for securing a metal noble tip to an electrode of a spark plug using a resistance and laser welding process | Akira Suzuki, Tomoaki Kato, Kazuyoshi Torii | 2010-02-23 |