Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592994 | Propulsion seal for wire line core drilling apparatus | Irvin J. Laporte | 1997-01-14 |
| 5339915 | Drilling apparatus, particularly wire line core drilling apparatus | Irwin J. Laporte | 1994-08-23 |
| 5251710 | Stabilized drill tube | Irwin J. Laporte | 1993-10-12 |