Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10697246 | Shaft enlargement arrangement for a boring system | Daniel Coenraad Pretorius, Barend Jacobus Jordaan, Louis Germishuys, Nicolaas Bodenstein Goodwin, Gareth Robert Sheppard | 2020-06-30 |
| 6431653 | Tunnel-boring machine and method of using the same | — | 2002-08-13 |
| 4474253 | Apparatus for producing an upwardly directed drill hole | — | 1984-10-02 |