Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863493 | High purity acetylene gas | Yasuo Kotani, Kengi Yamawaki | 1989-09-05 |
| 4840067 | Semiconductor pressure sensor with method diaphragm | Naohito Mizuno, Tadashi Hattori, Seizi Huzino, Yoshiyasu Ando | 1989-06-20 |
| 4823760 | Internal combustion engine controlling apparatus | — | 1989-04-25 |
| 4805217 | Receiving set with playback function | Yoshiharu Morihiro | 1989-02-14 |