Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880719 | Two component electrophotographic developer | Toshiaki Murofushi, Hiroshi Nakazawa, Koichi Oyamada, Shigeo Aonuma, Yasuhiro Ohya | 1989-11-14 |
| 4797340 | Dry electrophotographic toner comprising graft copolymer | Koichi Tanaka, Shigeo Aonuma, Toshiaki Murofushi, Takaaki Kimura | 1989-01-10 |