Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889401 | Birefringent optical waveguide structure having a strip waveguide buried in a cladding layer and the method of manufacturing | Hartmut Schneider, Holger Karstensen, Helmut Zrschizky | 1989-12-26 |
| 4871224 | Device for optical connections of one or more optical emitters with one or more optical detectors of one or more integrated circuits | Holger Karstensen | 1989-10-03 |