Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11056858 | Spark plug having a housing with a channel part | Yoshihiro Izumi, Kanechiyo Terada, Tetsuya Miwa | 2021-07-06 |
| 11005238 | Spark plug | — | 2021-05-11 |
| 10938184 | Spark plug | Yuuki Kawata, Kanechiyo Terada, Tetsuya Miwa | 2021-03-02 |
| 10938186 | Spark plug electrode and spark plug | Ryohei Akiyoshi, Ken Hanashi | 2021-03-02 |
| 10931086 | Spark plug including a ground electrode having slanted surfaces and a facing portion facing a distal end surface of a center electrode | Daisuke Shimamoto, Yuya Abe | 2021-02-23 |
| 10886709 | Spark plug that prevents gas turbulence in the discharge space | Yuya Abe | 2021-01-05 |