Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864324 | Color image forming method and ink used therefor | Katsuhiro Shirota, Tsuyoshi Eida | 1989-09-05 |
| 4841037 | Amino sulfonaphtholtrisazo compounds and recording liquids containing the same | Tokuya Ohta, Masatsune Kobayashi, Konoe Miura, Hiroshi Takimoto, Tomio Yoneyama | 1989-06-20 |
| 4804411 | Recording liquid | Tsuyoshi Eida, Katsuhiro Shirota | 1989-02-14 |