Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4651933 | Cone crusher | Helmut Stockmann | 1987-03-24 |
| 4629197 | Cone crusher labyrinth seal | Helmut Stockmann | 1986-12-16 |
| 4602746 | Cone crusher labyrinth seal | Helmut Stockmann | 1986-07-29 |