Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12378803 | Flared end section assembly and method of making same | — | 2025-08-05 |
| 9662826 | Coilable dual wall corrugated pipe and related method | Carl Raymond Douglass, III, Joseph Dale Larkins | 2017-05-30 |
| 9321210 | Plastic pipe with bell | Tony Kime, Hubert Kossner | 2016-04-26 |
| 7063108 | Corrugation structure for pipe | Bill Russell Vanhoose | 2006-06-20 |
| 6941972 | Corrugated pipe | Bill Russell Vanhoose | 2005-09-13 |
| 6840285 | Corrugation structure for pipe | Bill Russell Vanhoose | 2005-01-11 |
| 6578882 | Corrugated pipe structure | — | 2003-06-17 |