Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4577703 | Apparatus for making boreholes in the lateral walls of narrow underground mine workings | Frieda Cyriacy, Ingeborg Havemann | 1986-03-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4577703 | Apparatus for making boreholes in the lateral walls of narrow underground mine workings | Frieda Cyriacy, Ingeborg Havemann | 1986-03-25 |