Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678372 | System for building construction using preformed, reinforced concrete panels | Donald W. Thomson | 1997-10-21 |
| 5593709 | Mold for forming panels for prefabricated construction | Donald W. Thomson | 1997-01-14 |