Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11204498 | Optical element with a fresnel structure, and display device with such an optical element | Eduard Schmidt, Wolfgang Singer, Norbert Kerwien | 2021-12-21 |
| 11194177 | Spectacle lens for a display device which can be placed on the head of a user and generates an image | — | 2021-12-07 |
| 11086142 | Progressive spectacle lens with regionally varying refractive index and method for the design of same | Gerhard Kelch, Helmut Wietschorke | 2021-08-10 |
| 10989932 | Progressive spectacle lens having a variable refractive index and method for the design and production thereof | Gerhard Kelch, Helmut Wietschorke | 2021-04-27 |