Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10447015 | Spark plug production method, spark plug production device and assembly inspection method | Masafumi Okuda, Kanako Nishiyama | 2019-10-15 |
| 10270229 | Spark plug production method, spark plug production device and assembly inspection method | Masafumi Okuda, Kanako Nishiyama | 2019-04-23 |
| 10205306 | Method for producing spark plug | Masafumi Okuda, Kanako Nishiyama | 2019-02-12 |