Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9197038 | Spark plug and method of manufacturing the same | Masahiro Inoue | 2015-11-24 |
| 8704434 | Spark plug and method of manufacturing the same | Hiroaki Nasu, Makoto Sugita | 2014-04-22 |
| 8294344 | Spark plug and weld metal zone | Kazuyoshi Torii, Akira Suzuki, Naomichi Miyashita, Mamoru Musasa | 2012-10-23 |