Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4442375 | Electrical self-purification ignition plug | Shunichi Takagi, Yasuhiko Suzuki | 1984-04-10 |
| 4427915 | Spark plug and the process for production thereof | Shunichi Takagi, Yasuhiko Suzuki | 1984-01-24 |
| 4414483 | Spark plug and manufacturing process thereof | Shunichi Takagi, Yasuhiko Suzuki | 1983-11-08 |
| 4400643 | Wide thermal range spark plug | Shunichi Takagi, Yasuhiko Suzuki | 1983-08-23 |
| 4393324 | Spark plug with a sphere-like metal center electrode and manufacturing process thereof | Shunichi Takagi, Yasuhiko Suzuki | 1983-07-12 |
| 4341195 | Ignition system for spark plugs capable of removing carbon deposits | Takashi Suzuki | 1982-07-27 |
| 4261085 | Method of making an ignition plug insulator having an electrically conductive end | Shunichi Takagi | 1981-04-14 |
| 4224554 | Spark plug having a low noise level | Shunichi Takagi, Mitsutaka Yoshida | 1980-09-23 |
| 4217873 | Ignition circuit for self-purifying creeping discharge spark plugs | Takashi Suzuki, Toshihiko Uenaga, Fumio Zega | 1980-08-19 |
| 4191155 | Internal combustion engine ignition noise preventing device | Mitsutaka Yoshida, Takashi Suzuki, Junji Sunohara | 1980-03-04 |