Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6601352 | Insulated attic access cover | James S. Andrews, David Koch, John R. Twardy, Mark H. Theno | 2003-08-05 |
| 6357185 | Rafter air infiltration block | James S. Andrews, David Koch, John R. Twardy, Mark H. Theno | 2002-03-19 |