Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5064693 | Method of adjusting a gas sensor | Nobuhiro Hayakawa, Tetsusyo Yamada | 1991-11-12 |
| 5062306 | Apparatus for detecting torque of rotating shaft | Shigeyuki Gotoh, Isao Suzuki | 1991-11-05 |
| 4836906 | Air-fuel ratio sensor | Tetsusyo Yamada, Nobuhiro Hayakawa | 1989-06-06 |
| 4786267 | Spark plug | Akihiro Toya, Takashi Yamaguchi, Junichi Kagawa | 1988-11-22 |
| 4765880 | Air/fuel ratio sensor | Nobuhiro Hayakawa, Shigeru Miyata, Tetsusho Yamada | 1988-08-23 |
| 4743793 | Spark plug | Akihiro Toya, Takashi Yamaguchi, Junichi Kagawa | 1988-05-10 |
| 4722779 | Air/fuel ratio sensor | Tetsusyo Yamada, Nobuhiro Hayakawa, Keiichi Hayashi, Toyohei Nakajima, Yasushi Okada | 1988-02-02 |
| 4722778 | Gas sensor with gas diffusion chamber between two platy solid electrolyte cells | Nobuhiro Hayakawa, Tetsusyo Yamada | 1988-02-02 |
| 4659960 | Electrode structure for a spark plug | Akihiro Toya, Junichi Kagawa, Hiroaki Mori | 1987-04-21 |