Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5494318 | Secondary containment system | George J. Donovan, Daniel Martin | 1996-02-27 |
| 5407514 | Method for welding thermoplastic materials | Ernest O. Butts, Robert Pinder | 1995-04-18 |
| 5407520 | Welding rod | Ernest O. Butts, Robert Pinder | 1995-04-18 |
| 5176025 | Pipeline secondary containment system and method | — | 1993-01-05 |
| 4672366 | Subterranean tank leak containment and detection system | — | 1987-06-09 |
| 4568925 | Subterranean tank leak detection system and method | — | 1986-02-04 |