Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8727249 | Roller mill for grinding particulate material | Alexander Helm | 2014-05-20 |
| 8528844 | Roller mill with application of gas | Alexander Helm | 2013-09-10 |
| 8413917 | Roller mill with gas duct | — | 2013-04-09 |
| 4653578 | Heat exchanger | — | 1987-03-31 |