Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6688932 | Method for manufacturing spark plug and caulking metallic mold | Hiroaki Nasu, Wataru Matsutani, Makoto Sugimoto, Hirohito Ito | 2004-02-10 |
| 6538365 | Metal member with chromate coat, spark plug with chromate coat and manufacturing methods thereof | Hiroaki Nasu, Wataru Matsutani | 2003-03-25 |