Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12259279 | Electromagnetic wave measuring apparatus and electromagnetic wave measuring method | Takeshi Sugiyama, Shintaro HISATAKE | 2025-03-25 |
| 10615577 | Method for manufacturing spark plug | Norihide Kachikawa | 2020-04-07 |
| 10439368 | Production method of spark plug | Norihide Kachikawa | 2019-10-08 |