Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12407148 | Spark plug | Kaito Nakamura, Takaaki Kikai, Kengo Hattori | 2025-09-02 |
| 10965104 | Spark plug | Kazuki ITO | 2021-03-30 |
| 10958045 | Spark plug | Kazuki ITO | 2021-03-23 |
| 10498110 | Spark plug | Kazuki ITO | 2019-12-03 |
| 10447014 | Spark plug and manufacturing method therefor | Takaaki Kikai, Takuto Nakada | 2019-10-15 |
| 10312669 | Spark plug | Tatsuya Gozawa, Tsutomu Shibata | 2019-06-04 |
| 10186845 | Electrode tip for spark plug, and spark plug | Tatsuya Gozawa, Magoki Shimadate, Yusuke KAWASHIMA | 2019-01-22 |
| 10153621 | Spark plug | Takuto Nakada | 2018-12-11 |
| 10033163 | Spark plug | Tatsuya Gozawa, Tsutomu Shibata | 2018-07-24 |
| 9948068 | Spark plug | Tsutomu Shibata | 2018-04-17 |
| 9948069 | Spark plug | Masayuki Segawa | 2018-04-17 |
| 9887519 | Spark plug | Kazuki ITO, Tsutomu Shibata | 2018-02-06 |
| 9853423 | Spark plug | Takuto Nakada, Tsutomu Shibata, Takaaki Kikai | 2017-12-26 |
| 9705292 | Spark plug and method for producing the same | Tatsuya Gozawa, Tsutomu Shibata | 2017-07-11 |
| 9627857 | Spark plug | Tomonori Kanemaru | 2017-04-18 |
| 9548593 | Spark plug | Tomonori Kanemaru, Osamu Yoshimoto | 2017-01-17 |
| 9197036 | Spark plug | Tomonori Kanemaru | 2015-11-24 |
| 8878424 | Spark plug | Tomoo Tanaka, Tsutomu Shibata | 2014-11-04 |
| 8810120 | Spark plug | Osamu Yoshimoto | 2014-08-19 |
| 8618725 | Spark plug | Tsutomu Shibata, Tomoo Tanaka | 2013-12-31 |
| 8415867 | Spark plug | Tomoo Tanaka | 2013-04-09 |