Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10644483 | Method of inspecting spark plug and method of manufacturing spark plug | — | 2020-05-05 |
| 10447015 | Spark plug production method, spark plug production device and assembly inspection method | Toshiyuki Otsuki, Kanako Nishiyama | 2019-10-15 |
| 10270229 | Spark plug production method, spark plug production device and assembly inspection method | Toshiyuki Otsuki, Kanako Nishiyama | 2019-04-23 |
| 10205306 | Method for producing spark plug | Toshiyuki Otsuki, Kanako Nishiyama | 2019-02-12 |