Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7122947 | Glow plug and spark plug, and manufacturing method therefor | Hiroaki Nasu, Wataru Matsutani, Chiaki Kumada | 2006-10-17 |
| 6791245 | Glow plug and spark plug, and manufacturing method therefor | Hiroaki Nasu, Wataru Matsutani, Chiaki Kumada | 2004-09-14 |
| 6699089 | Sheathed glow plug and method of manufacturing the same | — | 2004-03-02 |
| 6437493 | Glow plug and spark plug, and manufacturing method therefor | Hiroaki Nasu, Wataru Matsutani, Chiaki Kumada | 2002-08-20 |
| 6236148 | Spark plug with specific metal shell coating | Hiroaki Nasu, Wataru Matsutani, Chiaki Kumada | 2001-05-22 |