Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4672263 | Single-ended fluorescent discharge lamp construction | Horst Wittmann | 1987-06-09 |
| 4469983 | Electric lamp with an envelope seal designed as pinch seal, and a device and method for its manufacture | Dieter Hofmann, Alfred Wacker | 1984-09-04 |