Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7948182 | Low-pressure gas discharge lamp with a reduced argon proportion in the gas filling | Jürgen Dichtl, Roland Hoffmann | 2011-05-24 |
| 7408295 | Mercury amalgams for elevated temperatures in discharge lamps | Sylvia Frenzel, Roland Hoffmann | 2008-08-05 |
| 4276603 | Diffusion furnace microcontroller | John H. Fabricius, Donald G. Landis | 1981-06-30 |