Issued Patents 2005
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6864622 | Spark plug | Masayuki Segawa, Satoko Ito, Osamu Yoshimoto | 2005-03-08 |
| 6858975 | Spark plug having an oil film on an intermediate portion of the insulator or intermediate portion of the metallic shell | — | 2005-02-22 |
| 6846416 | Process for treating chromate waste liquid | Hiroaki Nasu | 2005-01-25 |
| 6838809 | Chromate film-containing plug metal component and method for producing the same | Hiroaki Nasu, Makoto Sugimoto, Mitsuru Yoshida | 2005-01-04 |