Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8424570 | Pipe thread protector | David W. Clem, Jeffrey D. Lendermon | 2013-04-23 |
| 7419198 | Elongated member lifting system | David W. Clem | 2008-09-02 |
| 6676422 | Power cord composite threaded sealing cap | David W. Clem, Darrell J. Weigelt | 2004-01-13 |
| 6261037 | Connector assembly | Darrell Richards, William Thornton, Bernard Casteran, Cavin Foord | 2001-07-17 |
| 5556320 | Mobile vibrating abrasive cleaning apparatus | — | 1996-09-17 |
| 5267648 | Device for the transporting and stacking of cylindrical objects, such as gas cylinders, pipes, etc. | — | 1993-12-07 |