Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D539930 | Wall face | David J. Sayles | 2007-04-03 |
| D539436 | Block face | David J. Sayles | 2007-03-27 |
| D539437 | Block face | David J. Sayles | 2007-03-27 |
| 6431798 | Configurable block for retaining wall | — | 2002-08-13 |