Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821466 | Method for grinding using a magnetic fluid and an apparatus thereof | Koji Kato, Noritsugu Umehara, Shin Sato | 1989-04-18 |
| 4811242 | Chinese character printer controlling device | — | 1989-03-07 |