Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5784144 | Multifocal spectacle lens | Gerhard Kelch, Konrad Saur, Helmut Wietschorke | 1998-07-21 |
| 5444503 | Spectacle lens | Gerhard Kelch, Helmut Wietschorke | 1995-08-22 |
| 5137343 | Multifocal surface for a multifocal spectacle lens | Gerhard Kelch, Helmut Wietschorke | 1992-08-11 |
| 4630906 | Blank for eyeglass lenses having ellipse-like edge curves and means and method for selecting | Hubert Bammert, Egon Mosch | 1986-12-23 |
| 4613217 | Spectacle lens having astigmatic power | Gerhard Fuerter | 1986-09-23 |
| 4561736 | Eyeglass lenses for persons suffering from severe ametropia | Gerhard Furter | 1985-12-31 |