Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10829936 | Hip and ridge shingle | Lawrence J. Grubka, John Thies | 2020-11-10 |
| 10584494 | Asphalt based roofing material with increased infrared reflectivity | Bert W. Elliott | 2020-03-10 |
| 10538918 | Shingle sealing arrangements | David P. Aschenbeck, James E. Loftus, Donn R. Vermilion, Lawrence J. Grubka, Carmen Anthony LaTorre +8 more | 2020-01-21 |