Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6218025 | Sintering electrode | Bernhard Altmann, Wolfram Graser, Peter Schade | 2001-04-17 |
| 6069456 | Mercury-free metal halide lamp | Dieter Lang, Klaus Stockwald | 2000-05-30 |
| 5821696 | Method and circuit to start and operate high pressure discharge lamps | Joachim Arlt | 1998-10-13 |
| 5729091 | Metal halide discharge lamp | Clemens Barthelmes, Andreas Hohlfeld, Jurgen Vom Scheidt | 1998-03-17 |
| 5461281 | High-pressure discharge lamp with a halide fill including life-extending additives | Guenter Soehring, Richard Ullmann | 1995-10-24 |
| 5436533 | Method to operate a high-pressure discharge lamp suitable for horizontal arc position | Juergen Seehawer, Franz Bernitz | 1995-07-25 |
| 5363007 | Low-power, high-pressure discharge lamp, particularly for general service illumination use | Andreas Hohlfeld, Guenter Soehring | 1994-11-08 |
| 5210463 | Metal halide low-power high-pressure discharge lamp | Andreas Hohlfeld | 1993-05-11 |
| 4633136 | High-pressure discharge lamp with low power input | Helmut Klingshirn, Achim Gosslar, Jurgen Heider | 1986-12-30 |
| 4291254 | Discharge lamp energization circuit, particularly for audio and supersonic frequency operation of high-pressure discharge lamps | Joachim Arlt | 1981-09-22 |