Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888264 | Process for preparing toner or capsule toner for use in electrophotography | Toru Matsumoto, Toshiyuki Koshio, Hisayuki Ushiyama, Masuo Yamazaki, Ichiro Ohsaki +3 more | 1989-12-19 |
| 4797344 | Encapsulated toner having shell with first vinyl polymer with Mn of 2000-225000 and second vinyl polymer with Mn of 1000-15000 | Toshiaki Nakahara, Ichiro Ohsaki, Hisayuki Ushiyama, Masashi Kiuchi, Masuo Yamazaki +1 more | 1989-01-10 |