Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872418 | Magnet roll developing apparatus | Masao Yoshikawa | 1989-10-10 |
| 4860048 | Image forming apparatus | Masahiro Itoh, Yoshihiro Murasawa, Atsushi Takeda, Hiroaki Tsuchiya | 1989-08-22 |