Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4750567 | Rotary hammer driving mechanism | Horst Grossmann, Klaus Kalbacher, Karl Schekulin | 1988-06-14 |
| 4657088 | Rotary hammer driving mechanism | Horst Grossmann, Klaus Kalbacher, Karl Schekulin | 1987-04-14 |