Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4952047 | Progressives brillenglas lens with additional channel of vision | Rudolf Barth | 1990-08-28 |
| 4856889 | Uniform strength ophthalmic lens having a gradient refractive index changing rotation-symmetrically about the optical axis and method of making it | Gunther Guilino | 1989-08-15 |
| 4290471 | Built-up core for the bead of a pneumatic tire for wheel rims with inclined shoulders | — | 1981-09-22 |