Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6985286 | Catadioptric optical system and exposure apparatus having the same | David Shafer, Helmut Beierl, Karl-Heinz Schuster, Wilhelm Ulrich | 2006-01-10 |
| 6717722 | Catadioptric optical system and exposure apparatus having the same | David Shafer, Helmut Beierl, Karl-Heinz Schuster, Wilhelm Ulrich | 2004-04-06 |
| 6496306 | Catadioptric optical system and exposure apparatus having the same | David Shafer, Helmut Beierl, Karl-Heinz Schuster, Wilhelm Ulrich | 2002-12-17 |
| 6252712 | Optical system with polarization compensator | Winfried Kaiser, Christian Wagner, Michael Gerhard, Karl-Heinz Schuster | 2001-06-26 |
| 4786160 | Multi-focal spectacle lens having at least one progressive surface | — | 1988-11-22 |
| 4561736 | Eyeglass lenses for persons suffering from severe ametropia | Hans Lahres | 1985-12-31 |