Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4517777 | Trenchduct side member extrusion adapted for multiple positioning of cover plate | — | 1985-05-21 |
| 4404779 | Trenchduct construction having adjustable lid-supporting means | Michael A. Murray | 1983-09-20 |