Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10431960 | Spark plug for internal combustion engine | Ryohei Akiyoshi | 2019-10-01 |
| 10348060 | Spark plug | Tomoyuki Watanabe, Ryohei Akiyoshi | 2019-07-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10431960 | Spark plug for internal combustion engine | Ryohei Akiyoshi | 2019-10-01 |
| 10348060 | Spark plug | Tomoyuki Watanabe, Ryohei Akiyoshi | 2019-07-09 |