Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10790639 | Spark plug | — | 2020-09-29 |
| 10720759 | Ignition plug | — | 2020-07-21 |
| 10680416 | Method for producing a spark plug including an electrode having a base portion and a tip fixed to the base portion | Yusuke Tenkumo | 2020-06-09 |