Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9825432 | Spark plug for internal combustion engine and production method thereof | Masataka Deguchi, Kanechiyo Terada, Tetsuya Miwa | 2017-11-21 |
| 9793687 | Spark plug for internal combustion engine, having an annular ground electrode facing an outer circumference of a center electrode | Masataka Deguchi, Masamichi Shibata, Kanechiyo Terada, Tetsuya Miwa, Hironori Osamura | 2017-10-17 |
| 9385510 | Spark plug for internal combustion engine and method of manufacturing spark plug | Masataka Deguchi, Hironori Osamura, Kanechiyo Terada, Junichi Wada, Masamichi Shibata | 2016-07-05 |