Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7951239 | Method of producing roofing shingle coating asphalt from non-coating grade asphalt | David C. Trumbore, David R. Jones | 2011-05-31 |
| 7951240 | Process of producing roofing shingle coating asphalt allowing more material options | David C. Trumbore, Edward R. Harrington, Donn R. Vermilion, David R. Jones | 2011-05-31 |