Issued Patents 2016
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9496687 | Method for manufacturing spark plug | Keiji Ozeki, Tomoaki Kato | 2016-11-15 |
| 9455553 | Spark plug | Takuya Shimamura | 2016-09-27 |
| 9270088 | Method for inspecting spark plug and method for manufacturing spark plug | — | 2016-02-23 |