Issued Patents All Time
Showing 26–50 of 72 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5729505 | Ignition device for an internal combustion engine | Mitsuru Koiwa | 1998-03-17 |
| 5692482 | Ignition coil for internal combustion engine | Takeshi Shimizu, Koji Waki, Masaaki Taruya, Mitsuru Koiwa, Toshio Maekawa | 1997-12-02 |
| 5685282 | Ignition device and electrical connector for internal combustion engine | Mitsuru Koiwa | 1997-11-11 |
| 5682865 | Electrical connector and ignition apparatus for an internal combustion engine | Toshio Maekawa, Mitsuru Koiwa | 1997-11-04 |
| 5679012 | Electric connection member, ignition apparatus for internal combustion engine and manufacturing method thereof | — | 1997-10-21 |
| 5669367 | Ignition apparatus for internal combustion engine | Nobuyuki Sawazaki, Mitsuru Koiwa | 1997-09-23 |
| 5662091 | Ignition apparatus for internal combustion engine | Nobuyuki Sawazaki, Mitsuru Koiwa | 1997-09-02 |
| 5628298 | Waterproof spark plug hole cap of internal combustion engine | — | 1997-05-13 |
| 5622157 | Ignition apparatus for internal combustion engine and manufacturing method thereof | — | 1997-04-22 |
| 5585911 | Drive device for a rotary developing unit | Ryuji Hattori, Makoto Katayama | 1996-12-17 |
| 5585773 | Ignition coil for internal combustion engine | Mitsuru Koiwa, Yutaka Ohashi | 1996-12-17 |
| 5485825 | Internal combustion engine ignition device | Takeshi Shimizu, Masaaki Taruya, Mitsuru Koiwa, Toshio Maekawa | 1996-01-23 |
| 5477203 | Ignition coil assembly for internal combustion engine | Nobuyuki Sawazaki, Mitsuru Koiwa, Yutaka Ohashi | 1995-12-19 |
| 5444375 | Ionization current detector for detecting the ionization current generated in a plurality of ignition coils of an internal combustion engine | Toshio Ohsawa | 1995-08-22 |
| 5438971 | Ignition coil device for an internal combustion engine | Nobuyuki Sawazaki, Mitsuru Koiwa, Yutaka Ohashi | 1995-08-08 |
| 5437259 | Internal-combustion-engine ignition device | Kazuya Hamada | 1995-08-01 |
| 5424647 | Combustion detection device for internal combustion engine provided with a voltage regulating circuit to prevent premature combustion | Toshio Ohsawa | 1995-06-13 |
| 5377653 | Internal-combustion-engine ignition device | Kazuya Hamada | 1995-01-03 |
| 5307786 | Ignition apparatus for an internal combustion engine | Masayuki Ikeuchi | 1994-05-03 |
| 5293129 | Ionic current sensing apparatus for engine spark plug with negative ignition voltage and positive DC voltage application | Masayuki Ikeuchi, Toshio Iwata, Toshio Ohsawa, Takanobu Yonetsu | 1994-03-08 |
| 5272914 | Ignition system for internal combustion engines | Masayuki Ikeuchi, Toshio Iwata, Toshio Ohsawa | 1993-12-28 |
| 5271268 | Ionic current sensing apparatus | Masayuki Ikeuchi, Toshio Iwata, Atsushi Ueda, Toshio Ohsawa | 1993-12-21 |
| 5239973 | Ignition apparatus for an internal combustion engine | Masayuki Ikeuchi | 1993-08-31 |
| 5237272 | Magnetic circuit device for a hall effect type sensor for detecting crank angle | Yutaka Ohashi | 1993-08-17 |
| 5233295 | Angle detecting device having improved mounting arrangement for mounting Hall-effect sensor | Masayuki Ikeuchi | 1993-08-03 |