Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6521076 | Method of making shingles of two different dimensions using a common shingle mat size | — | 2003-02-18 |
| 6457290 | Shingle with a rendered shadow design | — | 2002-10-01 |
| 6421976 | Shingle for optically simulating a tile roof | John D. Phillips, Frank J. Macdonald | 2002-07-23 |
| 6367221 | Self-aligning shingles | — | 2002-04-09 |