Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8216717 | Heat flow regulating cover for an electrical storage cell | Brad N. Mathiowetz, Frank Kellershohn, Joachim Düren | 2012-07-10 |
| 7512521 | Intrinsically safe field maintenance tool with power islands | Joachim Düren | 2009-03-31 |
| 6925419 | Intrinsically safe field maintenance tool with removable battery pack | Joachim Düren, Brad N. Mathiowetz | 2005-08-02 |