Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10468859 | Ignition plug including a mark formed of an oxide film and method for manufacturing thereof | — | 2019-11-05 |
| 10454253 | Method for manufacturing an ignition plug including a mark formed of an oxide film | — | 2019-10-22 |
| 10320157 | Spark plug and method for manufacturing the same | — | 2019-06-11 |