Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5551198 | Sound collecting block and sound absorbing wall system | Craig R. Schaaf | 1996-09-03 |
| 5513475 | Multi-faceted interfacial building blocks | Craig R. Schaaf | 1996-05-07 |
| 5341618 | Non-rectangular block and wall | Craig R. Schaaf | 1994-08-30 |
| 5285610 | Building blocks and their use | Craig R. Schaaf | 1994-02-15 |
| 4932812 | Intermeshable construction unit | — | 1990-06-12 |
| 4711598 | Beach erosion control device | Craig R. Schaaf | 1987-12-08 |
| 4664552 | Erosion control apparatus and method | — | 1987-05-12 |
| 4479740 | Erosion control device and method of making and installing same | Russell J. McIntosh | 1984-10-30 |
| 4387491 | Burial enclosure arrangement and method | Craig R. Schaaf, James E. Van Linden, Kirk S. Van Linden | 1983-06-14 |
| 4367977 | Shore erosion prevention modules | Craig R. Schaaf | 1983-01-11 |
| 4367978 | Device for preventing beach erosion | Craig R. Schaaf | 1983-01-11 |
| 4312600 | Traffic barricade | Craig R. Schaaf | 1982-01-26 |
| 4281791 | Traction aid device | Craig R. Schaaf | 1981-08-04 |
| 4274430 | Walking cane apparatus | Craig R. Schaaf | 1981-06-23 |
| 4207718 | Concrete block wall | Russell J. McIntosh, David C. Morton | 1980-06-17 |