Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4623198 | Method for reducing compressed air losses when driving underground cavities supported by compressed air | Manfred Nussbaumer | 1986-11-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4623198 | Method for reducing compressed air losses when driving underground cavities supported by compressed air | Manfred Nussbaumer | 1986-11-18 |