Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8056640 | Hydraulic head clamp assembly for mobile drill rig | Ryan Kejr | 2011-11-15 |
| D397345 | Probe rod thread | Lawrence E. Screen | 1998-08-25 |
| 5635653 | Ground water sampling device | Volker Wittig, Thomas M. Christy | 1997-06-03 |
| 5612498 | Ground water sampling device | Volker Wittig, Thomas M. Christy | 1997-03-18 |
| 5606139 | Soil sample probe with retaining ring for holding core-catching structure within the probe | Volker Wittig, Thomas M. Christy | 1997-02-25 |
| 5588771 | Connector for coupling a pair of rods | Gregory H. Scott | 1996-12-31 |
| 5553979 | Pull cap for attachment to a probe rod | Volker Wittig | 1996-09-10 |
| 5503031 | Ground water sampling device | Gregory H. Scott, Thomas M. Christy | 1996-04-02 |
| 5186263 | Soil sample probe | Thomas M. Christy | 1993-02-16 |
| 4714273 | Vehicle for transporting elongated objects | — | 1987-12-22 |
| 4487004 | Combine harvester apparatus | — | 1984-12-11 |