Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691601 | Metal-halide discharge lamp for photooptical purposes | Anna-Maria Frey, Jürgen Maier, Manfred Pilsak, Clemens Barthelmes, Thomas Dittrich | 1997-11-25 |
| 5689154 | Metal halide gas discharge lamp for projection purposes | Clemens Barthelmes, Thomas Dittrich | 1997-11-18 |
| 5629585 | High-pressure discharge lamp, particularly low-rated power discharge lamp, with enhanced quality of light output | Bernhard Altmann, Juergen Begemann, Juergen Maier, Andreas Ponnier | 1997-05-13 |