Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673614 | Roof insulation board and method of making | James R. Wells, Donald C. Portfolio | 1987-06-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673614 | Roof insulation board and method of making | James R. Wells, Donald C. Portfolio | 1987-06-16 |