Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4900646 | Electrophotographic recording material and method of producing it | Ekkehard Niemann, Roland Herkert, Guido Blang | 1990-02-13 |
| 4713311 | Homogeneous photoconductive layer of amorphous silicon and hydrogen | Roland Herkert, Norbert Marschall, Karl-Heinrich Greeb | 1987-12-15 |