Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4905614 | Method for thermic disposal of waste materials | Jakob Hinterkeuser, Heinz-Dieter Waldhecker, John Rizzon, Kariheinz Passler | 1990-03-06 |
| 4592512 | Method and apparatus for the common grinding of two or more brittle materials having different grinding properties | Hans Kellerwessel, Raimund Zisselmar | 1986-06-03 |