Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4931349 | Electrophotographic photoreceptor having an azo compound | Masaru Hasegawa, Osamu Suda, Hisao Kohno, Tetsuhiro Umezaki, Norio Tanaka | 1990-06-05 |
| 4912001 | Electrophotographic photoreceptor comprising azo compound and coupler | Hisao Kouno, Hiroaki Saikatsu, Osamu Suda, Tetsuhiro Umezaki, Norio Tanaka +3 more | 1990-03-27 |