Issued Patents 2019
Showing 1–2 of 2 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 |