Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868086 | Electrographic toner and process for preparation thereof | Yukiya Sato, Kazunari Takemura, Rikio Tsushima | 1989-09-19 |
| 4795792 | Process for preparing particles of olefin-maleic anhydride copolyer | Yoshiyuki Muroi, Rikio Tsushima | 1989-01-03 |