Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4543310 | Electrophotographic element and photocopying process making use of certain 4-[bis-phenylamino]benzaldehyde azines | Roelof H. Everhardus | 1985-09-24 |
| 4286040 | Process for preparing an electrophotographic element | — | 1981-08-25 |