Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837137 | Electrophotographic photoreceptor | Koichi Aizawa, Yukio Takano, Yukihisa Tamura | 1989-06-06 |
| 4833055 | Electrophotographic photoreceptor comprising amorphous silicon and amorphous carbon buffer layer | Koichi Aizawa, Kenichi Hara, Toshiyuki Iijima, Yukio Takano | 1989-05-23 |