Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7321187 | Spark plug and method for manufacturing the spark plug | Tomoaki Kato, Kazuyoshi Torii | 2008-01-22 |
| 7084558 | Spark plug and method for manufacturing the spark plug | Tomoaki Kato, Kazuyoshi Torii | 2006-08-01 |
| 7045939 | Spark plug having a welded electrode and the method of producing the same | Mamoru Musasa, Kiyohiro Kondo | 2006-05-16 |
| 6707237 | Spark plug | Mamoru Musasa, Junichi Kagawa | 2004-03-16 |
| 6611084 | Spark plug | Mamoru Musasa, Tomoaki Kato | 2003-08-26 |
| 6489709 | Captive spark plug gasket | Wataru Matsutani | 2002-12-03 |
| 6433311 | Glow plug | Hiroyuki Kimata | 2002-08-13 |