Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11003348 | Arrangement for determining the pupil center | Alexander Wohlfahrt, Subhashini Mani | 2021-05-11 |
| 10146064 | Apparatus and method for ascertaining a type of spectacle lens and apparatus and method for determining a refractive power distribution of a progressive spectacle lens | Paraic Begley, Ray Steven Spratt, Timo Kratzer | 2018-12-04 |
| 10088691 | Apparatus and method for ascertaining a type of spectacle lens and apparatus and method for determining a refractive power distribution of a progressive spectacle lens | Paraic Begley, Ray Steven Spratt, Timo Kratzer | 2018-10-02 |
| 5784144 | Multifocal spectacle lens | Gerhard Kelch, Hans Lahres, Helmut Wietschorke | 1998-07-21 |