Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7384215 | Composite masonry block | — | 2008-06-10 |
| 7360970 | Composite masonry block | Dick J. Sievert | 2008-04-22 |
| 7048472 | Composite masonry block | Dick J. Sievert | 2006-05-23 |
| 6641334 | Composite masonry block | — | 2003-11-04 |
| 6616382 | Composite masonry block | Dick J. Sievert | 2003-09-09 |
| 6312197 | Composite masonry block | Dick J. Sievert | 2001-11-06 |
| 6183168 | Composite masonry block | Dick J. Sievert | 2001-02-06 |
| 6142713 | Composite masonry block | Dick J. Sievert | 2000-11-07 |
| 5884445 | Paving block array | — | 1999-03-23 |
| D404147 | Paving block | — | 1999-01-12 |
| 5827015 | Composite masonry block | Dick J. Sievert | 1998-10-27 |
| 5711129 | Masonry block | — | 1998-01-27 |
| 5709062 | Composite masonry block | — | 1998-01-20 |
| 5704183 | Composite masonry block | — | 1998-01-06 |
| 5589124 | Method of forming composite masonry blocks | Dick J. Sievert | 1996-12-31 |
| 5490363 | Composite masonry block | — | 1996-02-13 |
| 5249950 | Heated stripper shoe assembly | — | 1993-10-05 |
| 5062610 | Composite masonry block mold for use in block molding machines | Dick J. Sievert | 1991-11-05 |
| D321060 | Retaining wall block | Peter J. Blomquist | 1991-10-22 |
| D319885 | Retaining wall block | Peter J. Blomquist | 1991-09-10 |