Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9815229 | Method of rotational molding rib profile for large diameter pipe fittings | Carl Raymond Douglass, III | 2017-11-14 |
| 9662826 | Coilable dual wall corrugated pipe and related method | Carl Raymond Douglass, III, Timothy R. Toliver | 2017-05-30 |
| 8967674 | Rib construction for large diameter pipe fittings | Carl Raymond Douglass, III | 2015-03-03 |