Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772651 | Soil sampler liner with areas of reduced wall thickness | Thomas M. Christy, Michael E. Carlin | 2004-08-10 |
| 5588771 | Connector for coupling a pair of rods | Melvin P. Kejr | 1996-12-31 |
| 5542481 | Drive point locking method and apparatus | — | 1996-08-06 |
| 5503031 | Ground water sampling device | Thomas M. Christy, Melvin P. Kejr | 1996-04-02 |