Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4657432 | Installation for ground stabilization in hydraulic engineering | Peter Rentrop, Gunter H. Trapp | 1987-04-14 |
| 4624089 | Tie anchor for reinforced sandwich panels | — | 1986-11-25 |
| 4607505 | Hand needle for knitting or crochet | Walter Ossenberg-Engels | 1986-08-26 |