Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863584 | Apparatus for sensing air-fuel ratio | Hiroyuki Ishiguro, Yoshihide Kami | 1989-09-05 |
| 4840854 | Reinforced plate-like sintered bodies | Tetsusyo Yamada | 1989-06-20 |
| 4806739 | Plate-like ceramic heater | Hiroyuki Ishiguro, Yoshiki Kawachi, Tetsusyo Yamada | 1989-02-21 |