Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10663037 | Helical gear device | Taketsugu Sasaki, Kenichiro Tsukamoto, Kazuya Arakawa, Manabu Hashimoto | 2020-05-26 |
| 9939081 | Valve apparatus | Takanobu Kawano, Masashi Nakagawa | 2018-04-10 |
| 8210149 | Baffle plate | Kiyoshi Iwade, Masahito Kudo | 2012-07-03 |
| 8051822 | Spark plug and cylinder head assembly ensuring reliable ignition of air/fuel mixture | Masamichi Shibata | 2011-11-08 |
| 7449822 | Structure of spark plug ensuring stability in location of production of sparks | Shinichi Okabe, Hitoshi Morita, Tsunenobu Hori | 2008-11-11 |
| 7313949 | Combustion chamber pressure sensor equipped with damper body for attenuating transmitted engine vibration | Tetsuya Miwa, Hiromi Hiramatsu | 2008-01-01 |
| 6844662 | Spark plug and ignition apparatus | Hitoshi Morita, Shinichi Okabe, Takehiko Kato, Keiji Kanao, Tetsuya Miwa | 2005-01-18 |
| 6734677 | Device and method for detecting engine combustion condition | Makoto Toriyama, Tohru Yoshinaga | 2004-05-11 |
| 6725834 | Ignition system with ion current detecting circuit | Masatoshi Ikeda, Makoto Toriyama | 2004-04-27 |
| 6653767 | Spark plug and ignition apparatus | Hitoshi Morita, Shinichi Okabe, Takehiko Kato, Keiji Kanao, Tetsuya Miwa | 2003-11-25 |
| 6653840 | Ion current detecting device for internal combustion engine | Masatoshi Ikeda, Makoto Toriyama, Tohru Yoshinaga | 2003-11-25 |
| 6557537 | Ion current detection system and method for internal combustion engine | Masatoshi Ikeda, Makoto Toriyama | 2003-05-06 |
| 6397827 | Spark ignition device for direct injection-type engines | Takehiko Kato, Tohru Yoshinaga, Shinichi Okabe, Tatsushi Nakashima, Tetsuya Miwa | 2002-06-04 |
| 6265814 | Spark plug having a bypass electrode extending along a bypass path between center and ground electrode | Tohru Yoshinaga, Takehiko Kato, Tokio Kohama, Masaki Takeyama, Masatoshi Ikeda | 2001-07-24 |
| 6104195 | Apparatus for detecting a condition of burning in an internal combustion engine | Tohru Yoshinaga, Tokio Kohama, Yasuyuki Satou, Masao Kano, Toshiaki Yamaura | 2000-08-15 |
| 6020742 | Combustion monitoring apparatus for internal combustion engine | Masao Kano, Tokio Kohama, Tohru Yoshinaga, Yasuyuki Satou | 2000-02-01 |
| 5925819 | Combustion monitoring apparatus for internal combustion engine | Tohru Yoshinaga, Tokio Kohama, Yasuyuki Satou, Masao Kano | 1999-07-20 |
| 5855781 | Monolithic ceramic filter | Hisatomi Taguchi, Yuji Kamei | 1999-01-05 |
| 5772900 | Method and apparatus for reclaiming used working fluid | Takashi Yoshikawa | 1998-06-30 |
| 5520523 | Diaphragm-type pump | Kou Ohtsuka, Kazuhide Watanabe, Akira Shibata | 1996-05-28 |
| 5421710 | Fuel injection apparatus | Toshihiko Igashira, Yasuyuki Sakakibara, Kou Otsuka, Shigeiku Enomoto, Moriyasu Gotoh | 1995-06-06 |
| 5363816 | Valve drive device | Toshihiko Igashira, Yasuyuki Sakakibara, Moriyasu Gotoh, Kazuhide Watanabe | 1994-11-15 |
| 5338431 | Oxygen concentration detecting apparatus | Toshihiko Igashira, Michiyasu Moritsugu, Yoshiki Chujo | 1994-08-16 |
| 4815431 | Oil heating apparatus for internal combustion engine | Toshihiko Igashira, Takeshi Tanaka, Kouichi Sakakibara, Masao Wakayama, Takashi Sato +1 more | 1989-03-28 |
| 4767967 | High voltage generating device | Takeshi Tanaka, Masahiro Tomita, Toshihiko Igashira | 1988-08-30 |