Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6238141 | Apparatus for static underground drilling | Franz-Josef Puttmann, Andreas Riekes, Frank Prutti | 2001-05-29 |
| 4989804 | Belt retractor for safety-belt restraining systems in motor vehicles | Ralf Ebner | 1991-02-05 |