Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867789 | Flocculant purification of ink | Makoto Shioya, Masatsune Kobayashi | 1989-09-19 |
| 4864324 | Color image forming method and ink used therefor | Katsuhiro Shirota, Yuko Suga | 1989-09-05 |
| 4804411 | Recording liquid | Yuko Suga, Katsuhiro Shirota | 1989-02-14 |