Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9732853 | Joint-sealing strip | Bjoern Kethorn | 2017-08-15 |
| 8531106 | High-pressure discharge lamp with starting aid and method for producing the same | Markus Demmert, Helmut Weske, Ingmar Wieler, Ludger Wilken | 2013-09-10 |
| 7745999 | Lamp which is closed on two sides | Jurgen Graf, Michael Hulsemann, Anton Schogl, Karen Twesten | 2010-06-29 |
| 7253562 | Lamp which is closed on two sides | Jurgen Graf, Michael Hulsemann, Anton Schlögl, Karen Twesten | 2007-08-07 |
| 7221098 | Electric lamp with outer bulb and associated support body | Jurgen Graf, Michael Hulsemann, Anton Schlögl, Karen Twesten | 2007-05-22 |
| 7112116 | Process for producing an electric lamp with outer bulb | Jurgen Graf, Michael Hulsemann, Anton Schlögl, Karen Twesten | 2006-09-26 |
| 5854535 | Metal halide discharge lamp with a quartz discharge vessel and an outer UV radiation absorbent envelope | Dirk Hoffmann, Akihiro Kanda, Katsuya Otani | 1998-12-29 |
| 5729091 | Metal halide discharge lamp | Clemens Barthelmes, Jurgen Vom Scheidt, Dietrich Fromm | 1998-03-17 |
| 5363007 | Low-power, high-pressure discharge lamp, particularly for general service illumination use | Dietrich Fromm, Guenter Soehring | 1994-11-08 |
| 5210463 | Metal halide low-power high-pressure discharge lamp | Dietrich Fromm | 1993-05-11 |
| 5107177 | High-pressure discharge lamp | Clemens Barthelmes | 1992-04-21 |
| 4948530 | Method to make a reflective coating on high-pressure discharge lamps | Clemens Barthelmes, Lothar Vollmer | 1990-08-14 |