Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857972 | Impatt diode | Johann-Friedrich Luy | 1989-08-15 |
| 4843028 | Method for producing a spatially periodic semiconductor layer structure | Hans-Joest Herzog, Horst Kibbel | 1989-06-27 |
| 4806502 | Method for doping semi-conductor material during epitaxial growth | Horst Kibbel | 1989-02-21 |