Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5704561 | Wear-resistant hard-surfacing for the rolls of high-pressure roll presses for size reduction of granular material | Frank Fischer-Helwig, Ludger Alsmann, Michael Wollner | 1998-01-06 |
| 5203513 | Wear-resistant surface armoring for the rollers of roller machines, particularly high-pressure roller presses | Guenter Keller, Albrecht Wolter | 1993-04-20 |
| 4329180 | Method and apparatus for calcining fine-grained material and for generating coal dust | Horst Herchenbach | 1982-05-11 |
| 4280283 | Method and device for the operation of a hot gas generator within a dryer | Helmut Duill, Heinz Fasbender | 1981-07-28 |
| 4272710 | Method and apparatus for the adjustment of a definite position of rest of a rotary tube | Helmut Duill | 1981-06-09 |
| 4270466 | Method and apparatus for rendering an ignitable fuel-oxygen mixture inert | Helmut Duill, Heinz Fasbender, Rupprecht Graf | 1981-06-02 |
| 4236886 | Method and apparatus for the production of coaldust | Heinz Hoppen, Helmut Duill | 1980-12-02 |
| 4193554 | Method and apparatus for the drying and fine-grinding of coal | Horst Herchenbach, Helmut Wustner, Heinz Fasbender | 1980-03-18 |