Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D340296 | Flat multi-tube compact fluorescent lamp | Bruno Bachetzky, Lothar Haendler, Horst Porembski | 1993-10-12 |
| D304502 | Compact fluorescent lamp | Albert Heidemann | 1989-11-07 |
| D304087 | Compact fluorescent lamp | Horst Porembski | 1989-10-17 |