Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039909 | Electric lamp and holder for such a lamp | Manfred Kiesling, Josef Rothkranz | 1991-08-13 |
| 4567397 | Electric lamp having a light source aligned to a cap | Dieter Wilhelm, Rene Alexander Dominicus Toussaint | 1986-01-28 |
| 4485326 | Electric lamp with a sleeve-shaped cap | Paul Hellwig | 1984-11-27 |
| 4396860 | Electric lamp with a sleeve-shaped cap | Paul Hellwig | 1983-08-02 |
| 4384236 | Electric lamp with a sleeve-shaped cap | Paul Hellwig | 1983-05-17 |