Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6649015 | Method of making fitting joint for double containment pipe | John Allen, Robert Gurney | 2003-11-18 |
| 5624140 | Double containment pipe fitting | John Allen, Robert Gurney | 1997-04-29 |
| 5529656 | Method of making fitting joint for double containment pipe | Robert Gurney, John Lloyd, Michael Potts | 1996-06-25 |
| 5433484 | Double containment pipe and fitting joint | Robert Gurney, John Lloyd, Michael Potts | 1995-07-18 |