Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6283231 | Soil displacing screw auger and method for making a concrete pile with this auger | — | 2001-09-04 |
| 5875860 | Drill for making a pole in the ground and a method for applying such a drill | — | 1999-03-02 |
| 4359890 | Apparatus for testing the load-bearing properties of a foundation | — | 1982-11-23 |