Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847631 | Charge and deflection control type ink jet printer | Osamu Naruse, Sadao Kakeno, Chuji Ishikawa, Satoshi Sekimoto | 1989-07-11 |
| 4834533 | Measuring the refractive index of liquid | Yutaka Ebi, Michio Umezawa | 1989-05-30 |