Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5569430 | Method of making a roofing membrane | Brian Callaway | 1996-10-29 |
| 5474838 | Roofing membrane comprising fiberglass scrim stitched to a polyester mat | Brian Callaway | 1995-12-12 |