Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880666 | Method of manufacturing magnetic recording medium | Takeo Ito, Hajime Takeuchi, Minoru Hashimoto, Toshio Fukaya | 1989-11-14 |
| 4835082 | Toner for electrophotography | Manabu Sawada, Nobuyuki Igarashi, Akira Arikawa | 1989-05-30 |