Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4183701 | Coupling gear for lemniscate shield timbering frame | Harry Oppenlander | 1980-01-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4183701 | Coupling gear for lemniscate shield timbering frame | Harry Oppenlander | 1980-01-15 |