Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6920730 | Multi-layered shingle and method of making same | Walter F. Becker, Keith Rooks | 2005-07-26 |
| 6679020 | Multi-layered shingle and method of making same | Walter F. Becker, Keith Rooks | 2004-01-20 |
| 6679308 | Multi-layered shingle and method of making same | Walter F. Becker, Keith Rooks | 2004-01-20 |
| 6355132 | Multi-layered shingle and method of making same | Walter F. Becker, Keith Rooks | 2002-03-12 |
| 6174403 | Muli-layered and colored shingle and method of making same | Edward C. Steiner, Jr., Walter F. Becker, Calvin G. Trotter | 2001-01-16 |