Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362133 | Method of mining coal seams at a defined preset depth of cutting during ploughing with a cutter | — | 1994-11-08 |
| 5275469 | Method of working coal seams to a defined preset depth of cutting during ploughing with a cutter | Werner Reinelt | 1994-01-04 |