Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10458119 | Roofing shingles | Lawrence J. Grubka, David P. Aschenbeck, Donn R. Vermilion, William Edwin Smith | 2019-10-29 |
| 10358824 | Shingle sealing arrangements | David P. Aschenbeck, James E. Loftus, Donn R. Vermilion, Lawrence J. Grubka, Carmen Anthony LaTorre +8 more | 2019-07-23 |