Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843028 | Method for producing a spatially periodic semiconductor layer structure | Hans-Joest Herzog, Helmut Jorke | 1989-06-27 |
| 4806502 | Method for doping semi-conductor material during epitaxial growth | Helmut Jorke | 1989-02-21 |