Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5831388 | Rare earth metal halide lamp including niobium | Andreas Genz, Joachim Dirks, Hans-Werner Golling | 1998-11-03 |
| 5729091 | Metal halide discharge lamp | Andreas Hohlfeld, Jurgen Vom Scheidt, Dietrich Fromm | 1998-03-17 |
| 5691601 | Metal-halide discharge lamp for photooptical purposes | Anna-Maria Frey, Jürgen Maier, Manfred Pilsak, Ralf Seedorf, Thomas Dittrich | 1997-11-25 |
| 5689154 | Metal halide gas discharge lamp for projection purposes | Thomas Dittrich, Ralf Seedorf | 1997-11-18 |
| 5369334 | High-pressure discharge lamp with optimized discharge vessel | Hans-Werner Goelling | 1994-11-29 |
| 5144192 | High-pressure discharge lamp | — | 1992-09-01 |
| 5107177 | High-pressure discharge lamp | Andreas Hohlfeld | 1992-04-21 |
| 5037342 | Method of making an electric lamp, and more particularly a lamp vessel in which electrodes are retained in the lamp by a pinch or press seal | Axel Bunk | 1991-08-06 |
| 5001395 | High-pressure discharge lamp with corrosion protected electrode leads | Axel Bunk | 1991-03-19 |
| 4948530 | Method to make a reflective coating on high-pressure discharge lamps | Andreas Hohlfeld, Lothar Vollmer | 1990-08-14 |