Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4384788 | Self-supporting stirrer for mixing a bed of free-flowing solids | Wolfgang Lenart, Wolfgang Rau | 1983-05-24 |
| 4188132 | Spiral stirrer unsupported at one end | Wolfgang Lenart, Wolfgang Rau | 1980-02-12 |