Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10804682 | Spark plug | Takashi Sekizawa, Tomokatsu Kashima | 2020-10-13 |
| 10270227 | Ignition plug | Yukinobu Hasegawa | 2019-04-23 |
| 10211604 | Spark plug | Masaki Tokumaru | 2019-02-19 |
| 9543739 | Spark plug, and method for manufacturing spark plug | — | 2017-01-10 |
| 9525270 | Spark plug | Yuichi Matsunaga | 2016-12-20 |
| 9368944 | Spark plug | — | 2016-06-14 |
| 9236715 | Spark plug and method of manufacturing spark plug | Yukinobu Hasegawa | 2016-01-12 |
| 9172215 | Spark plug having center electrode tip of varying widths | Yukinobu Hasegawa, Kei Takahashi | 2015-10-27 |
| 9160146 | Spark plug | Yukinobu Hasegawa | 2015-10-13 |
| 9093823 | Spark plug and method of manufacturing spark plug | Yuichi Matsunaga | 2015-07-28 |
| 8981633 | Spark plug and production method therefor | Yuichi Matsunaga | 2015-03-17 |
| 8933618 | Electrode-attached insulator and spark plug | — | 2015-01-13 |
| 8878426 | Ignition plug | Yuichi Matsunaga | 2014-11-04 |
| 8796909 | Igniter plug with cooling fluid and method of manufacturing igniter plug | Yukinobu Hasegawa | 2014-08-05 |
| 8648519 | Spark plug for internal combustion engine | Kaori Kishimoto | 2014-02-11 |
| 8432091 | Corrosion suppressing spark plug | — | 2013-04-30 |
| 8243415 | Ignition plug and ignition system | — | 2012-08-14 |
| 7781949 | Spark plug | Kaori Kishimoto, Katsutoshi Nakayama, Hiroyuki Kameda | 2010-08-24 |
| 6779517 | Ignition device for internal combustion engine | — | 2004-08-24 |
| 6715340 | Misfiring detection apparatus for internal combustion engine | Tatsunori Yamada | 2004-04-06 |
| 6512375 | Method of detecting spark plug fouling and ignition system having means for carrying out the same | Tatsunori Yamada | 2003-01-28 |
| 6505605 | Control system for an internal combustion engine and method carried out by the same | Tatsunori Yamada, Takahiro Suzuki | 2003-01-14 |
| 6371078 | Method of controlling a direct fuel injection engine and storage medium storing the same | Noriaki Kondo | 2002-04-16 |