Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6663145 | Conduit coupling with interior grip rings | Lucian Hite Lyall, III, James A. Inhofe, Jr. | 2003-12-16 |
| 5295392 | Pipe testing equipment | Frederick W. Hensel, Mark F. Hensel, Steve D. Sandstrum, John Coleman, John H. Parnell | 1994-03-22 |