Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4435493 | Porous reusable ZnO electrophotographic element | Paul J. H. Tummers | 1984-03-06 |
| 4322486 | Electrophotographic process involving double charging | Johannes Kortenoeven | 1982-03-30 |