Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5391093 | Ceramic insulating block | Peter Schlagbaum, Helmut Stuhler | 1995-02-21 |
| 5349264 | Electric lamp construction having a contact tongue securely fixed by an insulator body in a sleeve | — | 1994-09-20 |
| 5233264 | Electric incandescent lamp | Helmut Tiesler, Wilfried Emunds, Hermann Muller | 1993-08-03 |
| 4998040 | Pinch seal mount assembly for electric lamp | Wilfried Emunds | 1991-03-05 |