Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4332512 | Arrangement for erecting columnar supporting elements for underground excavations | Peter Heintzmann, Manfred Koppers | 1982-06-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4332512 | Arrangement for erecting columnar supporting elements for underground excavations | Peter Heintzmann, Manfred Koppers | 1982-06-01 |