Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804609 | Developing agent for electrophotography with silica and magnetite additives | Yoshiaki Imanaka | 1989-02-14 |
| 4796049 | Heat roller for electrophotographic copying machine | Koichi Moriyama, Osamu Kawasaki, Ken-ichi Iwamoto | 1989-01-03 |