Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687807 | Cutter head for trenchless boring machine | Randy R. Runquist | 1997-11-18 |
| 4694679 | Gravitometer prover | — | 1987-09-22 |
| 4478001 | Protective entranceway | Tanai N. Hogan | 1984-10-23 |