Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9853423 | Spark plug | Daisuke Sumoyama, Takuto Nakada, Takaaki Kikai | 2017-12-26 |
| 9768588 | Spark plug and manufacturing method therefor | Takaaki Kikai, Tomoo Tanaka, Kaori Suzuki, Takehito Kuno | 2017-09-19 |
| 9705292 | Spark plug and method for producing the same | Tatsuya Gozawa, Daisuke Sumoyama | 2017-07-11 |