Issued Patents 2024
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11892712 | Progressive spectacle lens having a variable refractive index and method for the design and production thereof | Gerhard Kelch, Helmut Wietschorke | 2024-02-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11892712 | Progressive spectacle lens having a variable refractive index and method for the design and production thereof | Gerhard Kelch, Helmut Wietschorke | 2024-02-06 |