Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6705411 | Downhole coring device | Peter Nicolaas Looijen | 2004-03-16 |
| 6505693 | Soil sampler | Peter Nicolaas Looijen | 2003-01-14 |
| 5777242 | Soil analysis and sampling system | Willem Henricus Schrier | 1998-07-07 |
| 5263624 | Apparatus for longitudinally driving an elongate body | — | 1993-11-23 |