Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7530122 | Apparatus for waste line cleanout | — | 2009-05-12 |
| 5551198 | Sound collecting block and sound absorbing wall system | Cecil F. Schaaf | 1996-09-03 |
| 5513475 | Multi-faceted interfacial building blocks | Cecil F. Schaaf | 1996-05-07 |
| 5341618 | Non-rectangular block and wall | Cecil F. Schaaf | 1994-08-30 |
| 5285610 | Building blocks and their use | Cecil F. Schaaf | 1994-02-15 |
| 4711598 | Beach erosion control device | Cecil F. Schaaf | 1987-12-08 |
| 4387491 | Burial enclosure arrangement and method | Cecil F. Schaaf, James E. Van Linden, Kirk S. Van Linden | 1983-06-14 |
| 4367977 | Shore erosion prevention modules | Cecil F. Schaaf | 1983-01-11 |
| 4367978 | Device for preventing beach erosion | Cecil F. Schaaf | 1983-01-11 |
| 4312600 | Traffic barricade | Cecil F. Schaaf | 1982-01-26 |
| 4281791 | Traction aid device | Cecil F. Schaaf | 1981-08-04 |
| 4274430 | Walking cane apparatus | Cecil F. Schaaf | 1981-06-23 |