Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478845 | Boron addition for making potassium-doped tungsten | Hans-Joachim Lunk, Anna S. Nached, Maria Bozena Winnicka, Henry J. Stevens | 2002-11-12 |
| 6165412 | Method of making non-sag tungsten wire for electric lamps | Hans-Joachim Lunk, Henry J. Stevens | 2000-12-26 |
| 5795366 | Method of manufacturing a non-sag tungsten wire for electric lamps | Hans-Joachim Lunk, Alfred Gahn, Bernhard Altmann, Martin Fait | 1998-08-18 |
| 5785731 | Process of making a non-sag tungsten wire for electric lamps | Martin Fait, Joachim Fuchs, Alfred Gahn, Hans-Joachim Lunk, Burkhard Ziemer | 1998-07-28 |