Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887921 | Dot printer having means for discharging static electricity from the ink ribbon | Fumio Otsuka | 1989-12-19 |
| 4810302 | Azo pigment composition | Takenori Funatsu, Yoshitaka Ohtomo | 1989-03-07 |