Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4486156 | Concrete pump with buttressed distribution pipe | Herbert Feger, Rolf Griesbach | 1984-12-04 |
| 4431386 | Concrete-pump assembly | Jurgen O. Fehler, Rolf Griesbach | 1984-02-14 |