Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248226 | Connector for use in combination with blocks for wall structures or the like | Antonio Risi | 1993-09-28 |
| 5064313 | Embankment reinforcing structures | Antonio Risi | 1991-11-12 |
| D320088 | Modular block | Antonio Risi | 1991-09-17 |
| D305938 | Modular block | Antonio Risi | 1990-02-06 |
| D301063 | Modular block | Antonio Risi | 1989-05-09 |
| 4815897 | Retaining wall system | Antonio Risi | 1989-03-28 |
| D299069 | Reversible modular coping block | Antonio Risi | 1988-12-20 |
| 4601148 | Module for walls and free standing structure | Antonio Risi | 1986-07-22 |
| D284308 | Module for walls and free standing structures | Antonio Risi | 1986-06-17 |
| D280024 | Stretcher for cribbing | Antonio Risi | 1985-08-06 |
| D279030 | Header for cribbing | Antonio Risi | 1985-05-28 |
| 4490075 | Retaining wall system | Antonio Risi | 1984-12-25 |