Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D724704 | Corrugated foundation drainage tile | Carl Raymond Douglass, III | 2015-03-17 |
| 7434850 | Fluid-tight coupling system for corrugated pipe | Michael L. Pluimer | 2008-10-14 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D724704 | Corrugated foundation drainage tile | Carl Raymond Douglass, III | 2015-03-17 |
| 7434850 | Fluid-tight coupling system for corrugated pipe | Michael L. Pluimer | 2008-10-14 |