Issued Patents All Time
Showing 51–58 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4482475 | Resistor composition for resistor-incorporated spark plugs | Masao Sakai, Makoto Sugimoto | 1984-11-13 |
| 4446058 | Resistor composition for resistor-incorporated spark plugs | Masao Sakai, Miyakazu Hashizume, Makoto Sugimoto | 1984-05-01 |
| 4442375 | Electrical self-purification ignition plug | Kanemitsu Nishio, Shunichi Takagi | 1984-04-10 |
| 4427915 | Spark plug and the process for production thereof | Kanemitsu Nishio, Shunichi Takagi | 1984-01-24 |
| 4414483 | Spark plug and manufacturing process thereof | Kanemitsu Nishio, Shunichi Takagi | 1983-11-08 |
| 4400643 | Wide thermal range spark plug | Kanemitsu Nishio, Shunichi Takagi | 1983-08-23 |
| 4393324 | Spark plug with a sphere-like metal center electrode and manufacturing process thereof | Kanemitsu Nishio, Shunichi Takagi | 1983-07-12 |
| 4266324 | Silver weight unevenness correcting apparatus | Junzo Hasegawa, Susumu Kawabata, Hiroshi Niimi, Masaki Akatsuka, Takahiko Tsunekawa | 1981-05-12 |