Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5880810 | Series for progressive spectacle lenses | Helmut Altheimer, Rudolf Barth, Peter Baumbach, Jochen Brosig, Gregor Esser +3 more | 1999-03-09 |
| 5854669 | Series of lenses | Helmut Altheimer, Norbert Awrath, Rudolf Barth, Peter Baumbach, Jochen Brosig +6 more | 1998-12-29 |