Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D622416 | Portion of a mold insert for forming concrete blocks | Llewellyn L. Johnston | 2010-08-24 |
| D615668 | Portion of a retaining block | — | 2010-05-11 |
| D611166 | Retaining block | — | 2010-03-02 |
| D611165 | Retaining block | — | 2010-03-02 |
| D611167 | Portion of retaining block | — | 2010-03-02 |
| D611168 | Portion of retaining block | — | 2010-03-02 |
| D610712 | Portion of retaining block | — | 2010-02-23 |
| D610713 | Retaining block | — | 2010-02-23 |
| D610268 | Insert for mold for forming concrete blocks | Llewellyn L. Johnston | 2010-02-16 |
| D608462 | Wall block | — | 2010-01-19 |
| 7591447 | Wall block, system and mold for making the same | Llewellyn L. Johnston | 2009-09-22 |
| D595867 | Insert for mold for forming concrete blocks | Llewellyn L. Johnston | 2009-07-07 |
| D595868 | Wall block | Kenneth L. Headley | 2009-07-07 |
| 7503729 | Reinforced retaining wall and method of construction | Michael Simac | 2009-03-17 |
| D575413 | Wall block | Kenneth L. Headley | 2008-08-19 |
| 7328537 | Wall block, system and method | — | 2008-02-12 |
| D532119 | Wall block | — | 2006-11-14 |
| 7100886 | Apparatus and methods for making a masonry block with a roughened surface | Llewellyn L. Johnston | 2006-09-05 |
| D514233 | Wall block | — | 2006-01-31 |
| 5688078 | Interlocking retaining walls blocks and system | — | 1997-11-18 |
| 5350256 | Interlocking retaining walls blocks and system | — | 1994-09-27 |