Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9793687 | Spark plug for internal combustion engine, having an annular ground electrode facing an outer circumference of a center electrode | Masataka Deguchi, Masamichi Shibata, Kanechiyo Terada, Tetsuya Miwa, Yuuki Tsukamoto | 2017-10-17 |
| 9385510 | Spark plug for internal combustion engine and method of manufacturing spark plug | Masataka Deguchi, Kanechiyo Terada, Junichi Wada, Masamichi Shibata, Yuuki Tsukamoto | 2016-07-05 |
| 6891318 | Structure of spark plug designed to provide higher durability and fabrication method thereof | Tsunenobu Hori, Akihiko Mizutani, Kozo Takamura | 2005-05-10 |
| 6794803 | Spark plug for an internal combustion engine | Tsunenobu Hori, Yasutake Ishino, Akira Mitsuhashi, Mineo Okuma | 2004-09-21 |
| 6552476 | Spark plug for internal combustion engine having better self-cleaning function | Ken Hanashi, Yasutake Ishino | 2003-04-22 |
| 6316868 | Spark plug for internal combustion engine having better self-cleaning function | Yasutake Ishino, Makoto Yatou | 2001-11-13 |
| 6262522 | Spark plug for internal combustion engine | Nobuo Abe, Keiji Kanao, Kenji Horibe | 2001-07-17 |
| 6215235 | Spark plug having a noble metallic firing tip bonded to an electric discharge electrode and preferably installed in internal combustion engine | — | 2001-04-10 |
| 6147441 | Spark plug | — | 2000-11-14 |
| 6094000 | Spark plug for internal combustion engine | Nobuo Abe, Keiji Kanao, Kenji Horibe | 2000-07-25 |
| 6093071 | Spark plug and process of producing same | Nobuo Abe | 2000-07-25 |
| 5977695 | Spark plug having improved consumption resistance | Nobuo Abe | 1999-11-02 |
| 5811915 | Spark plug including electrode with protruding portion for holding noble metallic chip, and method of making the same | Nobuo Abe | 1998-09-22 |
| 5693999 | Multiple gap spark plug for internal combustion engine | Keiji Kanao | 1997-12-02 |