Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6434902 | Poured concrete wall insulation | — | 2002-08-20 |
| 6351918 | Insulated concrete wall | Albert P. Westra | 2002-03-05 |
| 6079176 | Insulated concrete wall | Albert P. Westra | 2000-06-27 |