Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12407148 | Spark plug | Kaito Nakamura, Daisuke Sumoyama, Kengo Hattori | 2025-09-02 |
| 12308620 | Spark plug | Satoshi Noguchi | 2025-05-20 |
| 10447014 | Spark plug and manufacturing method therefor | Daisuke Sumoyama, Takuto Nakada | 2019-10-15 |
| 9853423 | Spark plug | Daisuke Sumoyama, Takuto Nakada, Tsutomu Shibata | 2017-12-26 |
| 9768588 | Spark plug and manufacturing method therefor | Tomoo Tanaka, Tsutomu Shibata, Kaori Suzuki, Takehito Kuno | 2017-09-19 |
| 8866370 | Spark plug | Tsutomu Shibata, Kenji Nunome, Osamu Yoshimoto | 2014-10-21 |
| 8853928 | Spark plug electrode, method for producing same, spark plug, and method for producing spark plug | Tomo Tanaka, Tsutomu Shibata | 2014-10-07 |
| 8729783 | Spark plug electrode, method for producing same, spark plug, and method for producing spark plug | Tomo Tanaka, Tsutomu Shibata | 2014-05-20 |
| 8664842 | Spark plug | Tomoo Tanaka, Tsutomu Shibata, Osamu Yoshimoto, Takehito Kuno, Kenji Nunome | 2014-03-04 |
| 8523625 | Method of manufacturing spark plug | Tomonori Kanemaru, Osamu Yoshimoto, Masahiro Inoue | 2013-09-03 |
| 8368293 | Spark plug and method of manufacturing the same | Shinya Mitsuda, Takehito Kuno | 2013-02-05 |