Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5789849 | Low-pressure discharge lamp with base and mount | Andreas Hollstein | 1998-08-04 |
| 5491374 | Double-based low-pressure discharge lamp with misalignment-tolerant bases | — | 1996-02-13 |
| D340296 | Flat multi-tube compact fluorescent lamp | Bruno Bachetzky, Michael Kappler, Lothar Haendler | 1993-10-12 |
| D304087 | Compact fluorescent lamp | Michael Kappler | 1989-10-17 |