Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8834224 | Method of manufacturing metal shell assembly for spark plug, method of manufacturing spark plug, and apparatus for manufacturing metal shell assembly for spark plug | Keisuke Kure, Takashi Tamada | 2014-09-16 |
| 8640354 | Method for measuring deviation of joint position of member and method for producing spark plug | — | 2014-02-04 |
| 8628367 | Method for measuring deviation of joint position of member and method for producing spark plug | — | 2014-01-14 |