Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10428978 | Webless corrugated dual wall foundation drain and related method | — | 2019-10-01 |
| 10391695 | Retracting extruder barrel with cooling features | Brian L. Douglass | 2019-08-27 |
| 9815229 | Method of rotational molding rib profile for large diameter pipe fittings | Joseph Dale Larkins | 2017-11-14 |
| 9764506 | System and method of inspecting inner smooth wall of corrugated dual wall pipe | — | 2017-09-19 |
| 9662826 | Coilable dual wall corrugated pipe and related method | Joseph Dale Larkins, Timothy R. Toliver | 2017-05-30 |
| D787649 | Webless corrugated dual wall foundation drain | — | 2017-05-23 |
| 9469071 | Fused filament fabrication system and method | Brian L. Douglass | 2016-10-18 |
| 8991830 | Heat-fusible gasket and method of manufacture | — | 2015-03-31 |
| D724704 | Corrugated foundation drainage tile | Jeremy N. Duininck | 2015-03-17 |
| 8967674 | Rib construction for large diameter pipe fittings | Joseph Dale Larkins | 2015-03-03 |
| D650053 | Pipe rib gasket | — | 2011-12-06 |
| D644306 | Corrugation saddle gasket | — | 2011-08-30 |