Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808503 | Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide | Yasuyuki Yamada, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |
| 4808507 | Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based | Yasuyuki Yamada, Tsutomu Nishizawa, Akihiro Yamaguchi | 1989-02-28 |