Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8646266 | Hydraulic output drive shaft generator | Olaf Koltoff, Frank Ramm, Eckhard Skirde | 2014-02-11 |
| 8312715 | Hydraulic output drive shaft generator | Olaf Koltoff, Frank Ramm, Eckhard Skirde | 2012-11-20 |