Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8012576 | Roof coverings having improved tear strength | Jerry HC Lee, Gregory S. Helwig, David R. Jones | 2011-09-06 |
| 7951239 | Method of producing roofing shingle coating asphalt from non-coating grade asphalt | David R. Jones, Jason D. Guerra | 2011-05-31 |
| 7951240 | Process of producing roofing shingle coating asphalt allowing more material options | Edward R. Harrington, Jason D. Guerra, Donn R. Vermilion, David R. Jones | 2011-05-31 |