Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6538365 | Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof | Wataru Matsutani, Yoshito Uemura | 2003-03-25 |
| 6528929 | Spark plug with iridium-based alloy chip | Wataru Matsutani | 2003-03-04 |