Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471446 | Reduced skin friction bore casing | Frankie A. R. Queen | 2002-10-29 |
| 6234720 | Reduced skin friction sheet pile | Frankie A. R. Queen | 2001-05-22 |
| 5931604 | Reduced skin friction driven pile | Frankie A. R. Queen | 1999-08-03 |