Issued Patents 1989
Showing 1–3 of 3 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 | Ekkehard Klement, Holger Karstensen, Helmut Zrschizky | 1989-12-26 |
| 4842627 | Method for the manufacture of a preform for drawing glass fibers particularly infrared light waveguides for optical communications technology | Achim Schoberth | 1989-06-27 |
| 4795228 | Fiber taper particularly useful for coupling a monomode fiber to a semiconductor laser | — | 1989-01-03 |