Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11131008 | Heat-resistant Ir alloy | Shunsuke Yokota, Yoshinori Doi, Ryohei Akiyoshi | 2021-09-28 |
| 10938186 | Spark plug electrode and spark plug | Ryohei Akiyoshi, Masamichi Shibata | 2021-03-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11131008 | Heat-resistant Ir alloy | Shunsuke Yokota, Yoshinori Doi, Ryohei Akiyoshi | 2021-09-28 |
| 10938186 | Spark plug electrode and spark plug | Ryohei Akiyoshi, Masamichi Shibata | 2021-03-02 |