Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5900700 | Process and circuit arrangement for operating cold cathode discharge lamps | Joachim Arndt | 1999-05-04 |
| 5044263 | Electrically heated toaster | Karl Birkert, Heinz Marburger | 1991-09-03 |
| 4399585 | Vacuum cleaner with constant air flow | Werner Durr, Robert Maier | 1983-08-23 |
| 4370776 | Vacuum cleaner for household and industrial application | — | 1983-02-01 |