DF

Dietrich Fromm

OS Osram Sylvania: 1 patents #499 of 820Top 65%
Overall (All Time): #525,412 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
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