Issued Patents 2003
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6664719 | Spark plug | Masayuki Segawa, Satoko Ito | 2003-12-16 |
| 6597089 | Spark plug for internal combustion engine | — | 2003-07-22 |
| 6573641 | Spark plug | — | 2003-06-03 |
| 6538365 | Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof | Hiroaki Nasu, Yoshito Uemura | 2003-03-25 |
| 6533628 | Method of manufacturing spark plug and spark plug | — | 2003-03-18 |
| 6528929 | Spark plug with iridium-based alloy chip | Hiroaki Nasu | 2003-03-04 |