Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885018 | Method for manufacturing rotationally symmetrical porous solid bodies | Peter E. E. Geittner, Hans Lydtin, Gerd Romanowski | 1989-12-05 |
| 4871383 | Method of manufacturing optical fibres | Hans-Jurgen E. Hagemann, Jacques Warnier, Howard J. C. Wilson | 1989-10-03 |
| 4802733 | Fluorine-doped optical fibre and method of manufacturing such fibre | Peter E. E. Geittner, Dieter Leers, Howard J. C. Wilson | 1989-02-07 |