Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888561 | Amplifier and display using the former | Ryushi Shimokawa, Seiichi Ueda, Yasuji Kamata, Kenkichi Yamashita, Kazuo Kato | 1989-12-19 |
| 4814245 | Electrophotographic photoreceptor containing a phthalocyanine pigment and a bishydrazone compound | Seiji Horie, Naonori Makino | 1989-03-21 |
| 4800146 | Transparent electrophotographic photoreceptor comprising specific hydrazone and benzidine compounds as photoconductors | Hiroaki Yokoya, Kenji Sano, Hiromichi Tachikawa | 1989-01-24 |