Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32744 | Dual layer electrophotographic recording material containing a layer of selenium, arsenic and halogen, and thereabove a layer of selenium and tellurium | Hartmut Dulken, Karlheinz Kassel, Wolfgang Mows | 1988-09-06 |
| 4513072 | Dual layer electrophotographic recording material containing a layer of selenium, arsenic and halogen, and thereabove a layer of selenium and tellurium | Hartmut Dulken, Karlheinz Kassel, Wolfgang Mows | 1985-04-23 |
| 4343883 | Method for producing an electrophotographic recording material having dual layer of amorphous and crystallized Se | Karl-Heinz Kassel, Manfred Lutz, Josef Stuke | 1982-08-10 |
| 4298671 | Tellurium layer allows vapor deposition of crystalline selenium thereon in making double layer electrophotographic record material | Karl-Heinz Kassel, Manfred Lutz, Josef Stuke | 1981-11-03 |