Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830944 | Function separated photosensitive member having a diphenylamine derivative disazo charge generation material | Shoji Umehara, Masakazu Matsumoto, Takao Takiguchi | 1989-05-16 |