Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4721088 | Method for controlling an oxygen concentration detection apparatus with a heater element | Toyohei Nakajima, Yasushi Okada, Nobuyuki Oono | 1988-01-26 |
| 4719895 | Method for controlling an oxygen concentration sensor | Toyohei Nakajima, Yasushi Okada, Nobuyuki Oono | 1988-01-19 |
| 4689136 | Oxygen sensor assembly | Toyohei Nakajima | 1987-08-25 |
| 4683049 | Oxygen sensor assembly | Toyohei Nakajima | 1987-07-28 |
| 4491108 | Idling rpm feedback control method for internal combustion engines | Shumpei Hasegawa, Takashi Koumura | 1985-01-01 |
| 4475505 | System for controlling idling rpm by synchronous control of supplementary air | Shumpei Hasegawa, Takashi Koumura, Kiyoshi Oikawa | 1984-10-09 |