Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824294 | Method of and equipment for hydraulic forwarding of solids over long distances and/or to different heights; in particular in undergound mineshafts | Michael Kortenbusch | 1989-04-25 |
| 4763484 | Method of and apparatus for the cooling of underground mine shafts and/or machinery installed therein | Michael Kortenbusch | 1988-08-16 |