Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867789 | Flocculant purification of ink | Tsuyoshi Eida, Makoto Shioya | 1989-09-19 |
| 4841037 | Amino sulfonaphtholtrisazo compounds and recording liquids containing the same | Tokuya Ohta, Yuko Suga, Konoe Miura, Hiroshi Takimoto, Tomio Yoneyama | 1989-06-20 |