Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9742157 | Spark plug | Yuichi Yamada | 2017-08-22 |
| 9065255 | Spark plug and method of manufacturing the same | Nobuaki Sakayanagi, Tomoaki Kato, Ryuichi Ono | 2015-06-23 |
| 8368293 | Spark plug and method of manufacturing the same | Takehito Kuno, Takaaki Kikai | 2013-02-05 |