Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357750 | Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor | Yasuo Ito, Tessho Yamada | 1994-10-25 |
| 5288389 | Oxygen sensor with higher resistance to repeated thermal-shocks and shorter warm-up time | Tessho Yamada, Akio Mizutani | 1994-02-22 |
| 5279886 | Alumina sintered body | Takeshi Kawai, Harumi Aiba | 1994-01-18 |