Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11465314 | Method of producing insulator for spark plug | — | 2022-10-11 |
| 11374385 | Spark plug, noble metal tip, and manufacturing method for noble metal tip | Hiroshi Nakao | 2022-06-28 |