Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10903628 | Method for manufacturing spark plug | — | 2021-01-26 |
| 10804681 | Method for manufacturing a spark plug that makes welded portions uniform | — | 2020-10-13 |
| 10661378 | Method for manufacturing spark plug | — | 2020-05-26 |
| 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 |
| 9966737 | Method for manufacturing spark plug | — | 2018-05-08 |
| 9899806 | Method for manufacturing spark plug | Ryosuke Honda | 2018-02-20 |