Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11773473 | Heat-resistant IR alloy | Shunsuke Yokota, Yoshinori Doi, Ryohei Akiyoshi | 2023-10-03 |
| 11505848 | Heat-resistant Ir alloy | Shunsuke Yokota, Kenta Terai, Hayato Yasuhara, Ryohei Akiyoshi, Ikuya Ando | 2022-11-22 |
| 11486024 | Heat-resistant Ir alloy wire | Shunsuke Yokota, Kenta Terai, Hayato Yasuhara, Ryohei Akiyoshi, Ikuya Ando | 2022-11-01 |
| 11131008 | Heat-resistant Ir alloy | Shunsuke Yokota, Yoshinori Doi, Ryohei Akiyoshi | 2021-09-28 |
| 10938186 | Spark plug electrode and spark plug | Ryohei Akiyoshi, Masamichi Shibata | 2021-03-02 |
| 10777974 | Spark plug for internal combustion engine that makes re-discharge less prone to occur | Noriaki Nishio, Masamichi Shibata, Kanechiyo Terada, Ryohei Akiyoshi, Fumiaki Aoki | 2020-09-15 |
| 10050417 | Spark plug and manufacturing method thereof | Ryohei Akiyoshi, Tomoyuki Watanabe | 2018-08-14 |
| 9935429 | Ignition control system | Ryohei Akiyoshi, Tomoyuki Watanabe | 2018-04-03 |
| 9929542 | Spark plug and method for manufacturing the same | Kenichi Araya, Koji Yamanaka | 2018-03-27 |
| 9482203 | Spark plug for internal combustion engines and mounting structure for the spark plug | — | 2016-11-01 |
| 9343875 | Spark plug for internal combustion engines and mounting structure for the spark plug | — | 2016-05-17 |
| 8884504 | Spark plug for internal combustion engines and mounting structure for the spark plug | Nobuo Abe | 2014-11-11 |
| 8760045 | Spark plug for internal combustion engines and method for manufacturing the spark plug | Yasushi Kawashima | 2014-06-24 |
| 8523624 | Spark plug for internal combustion engine and manufacturing method thereof | Keiji Kanao, Kenka Tsubota | 2013-09-03 |
| 8398447 | Method for manufacturing spark plug for internal-combustion engine | Satoru Kadowaki, Tsunenobu Hori, Kenka Tsubota, Hirotaka Aida, Hiroya Ishiguro | 2013-03-19 |
| 8339021 | Spark plug for internal-combustion engine and method for manufacturing the same | Satoru Kadowaki, Tsunenobu Hori, Kenka Tsubota, Hirotaka Aida, Hiroya Ishiguro | 2012-12-25 |
| 8258686 | Spark plug for internal combustion engine | Keiji Kanao, Kenka Tsubota | 2012-09-04 |
| 7893604 | Spark plug with stream shaper to shape tumble vortex into desired stream in combustion chamber | Takayuki Takeuchi | 2011-02-22 |
| 7816846 | Spark plug with slant peripheral surface | Kenichiro Takada, Takayuki Takeuchi | 2010-10-19 |
| 7808166 | Spark plug having improved configuration of ground electrode for ensuring high ignition capability | Takayuki Takeuchi | 2010-10-05 |
| 7768184 | Spark plug with stream shaper to shape tumble vortex into desired stream in combustion chamber | Takayuki Takeuchi | 2010-08-03 |
| 7541724 | Spark plug requiring low discharge voltage and having high self-cleaning capability | Shinichi Okabe | 2009-06-02 |
| 7221079 | Spark plug with a plurality of ground electrodes | — | 2007-05-22 |
| 6956319 | Structure of spark plug designed to provide higher wear resistance to center electrode and production method thereof | Yasutake Ishino | 2005-10-18 |
| 6552476 | Spark plug for internal combustion engine having better self-cleaning function | Yasutake Ishino, Hironori Osamura | 2003-04-22 |