Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5110442 | Reinforced electrolyte function elements | Takao Kojima, Hiroyuki Ishiguro, Yoshiki Kawachi | 1992-05-05 |
| 5064693 | Method of adjusting a gas sensor | Nobuhiro Hayakawa, Kazunori Yokota | 1991-11-12 |
| 5047137 | Solid electrolyte air/fuel ratio sensor with voltage control | Takao Kojima, Hiroyuki Ishiguro, Yoshihide Kami | 1991-09-10 |
| 4935119 | Air/fuel ratio sensor | Nobuhiro Hayakawa | 1990-06-19 |
| 4840854 | Reinforced plate-like sintered bodies | Takao Kojima | 1989-06-20 |
| 4839018 | Air/fuel ratio detector | Sadao Ichikawa | 1989-06-13 |
| 4836906 | Air-fuel ratio sensor | Nobuhiro Hayakawa, Kazunori Yokota | 1989-06-06 |
| 4806739 | Plate-like ceramic heater | Takao Kojima, Hiroyuki Ishiguro, Yoshiki Kawachi | 1989-02-21 |
| 4792387 | Air-fuel ratio detecting device | Toshiyuki Ishihara, Takeshi Kamiya, Yutaka Nakayama | 1988-12-20 |
| 4785150 | Plate-like alumina heater | Takao Kojima, Nobuhiro Hayakawa, Yutaka Nakayama | 1988-11-15 |
| 4753203 | Air/fuel ratio sensor apparatus for use with internal combustion engine | — | 1988-06-28 |
| 4722779 | Air/fuel ratio sensor | Nobuhiro Hayakawa, Kazunori Yokota, Keiichi Hayashi, Toyohei Nakajima, Yasushi Okada | 1988-02-02 |
| H427 | Air/fuel ratio detector | Shintaro Hirate | 1988-02-02 |
| 4722778 | Gas sensor with gas diffusion chamber between two platy solid electrolyte cells | Nobuhiro Hayakawa, Kazunori Yokota | 1988-02-02 |
| 4629549 | Oxygen sensor | Takao Kojima, Yutaka Nakayama, Hiroyuki Ishiguro | 1986-12-16 |
| 4624770 | Air-fuel ratio sensor | Takao Kojima, Hiroyuki Ishiguro, Yutaka Nakayama | 1986-11-25 |
| 4615787 | Air/fuel ratio detector | Shintaro Hirate | 1986-10-07 |
| 4594139 | Air/fuel ratio detector | Yoshiaki Asayama, Shintaro Hirate | 1986-06-10 |
| 4591421 | Air/fuel ratio detector | Shintaro Hirate | 1986-05-27 |
| 4578172 | Air/fuel ratio detector | Shintaro Hirate | 1986-03-25 |
| 4578171 | Air/fuel ratio detector | Shintaro Hirate | 1986-03-25 |
| 4505807 | Oxygen sensor | — | 1985-03-19 |
| 4505806 | Oxygen sensor | — | 1985-03-19 |
| 4498968 | Oxygen sensor | Yutaka Nakayama | 1985-02-12 |
| 4450065 | Oxygen sensor | Yutaka Nakayama | 1984-05-22 |