Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11086142 | Progressive spectacle lens with regionally varying refractive index and method for the design of same | Christoph Menke, Helmut Wietschorke | 2021-08-10 |
| 10989932 | Progressive spectacle lens having a variable refractive index and method for the design and production thereof | Christoph Menke, Helmut Wietschorke | 2021-04-27 |
| 10969607 | Method for determining an improved design for a progressive lens | Ray Steven Spratt | 2021-04-06 |