Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940636 | Optical interference filter | Lieselotte Brock, Bruno Vitt | 1990-07-10 |
| 4889974 | Thin-film heating element | Hans Auding, Heiner Kostlin, Bruno Vitt | 1989-12-26 |
| 4401693 | Method of manufacturing a heat-reflecting filter | Heiner Kostlin, Leo M. Sprengers, Ronald J. Campbell | 1983-08-30 |