Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7309933 | Vibrator for acting on an object in a predetermined direction and apparatus for producing concrete blocks | — | 2007-12-18 |
| 7278845 | Concrete-block-making machine | Roland Krause | 2007-10-09 |