Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5868528 | Clean air bulk material handling method and system | Clifford B. Richardson | 1999-02-09 |
| 5700980 | Aerial cable spacer | Salvatore Bello | 1997-12-23 |
| 5639188 | Clean air bulk material handling system | Clifford B. Richardson | 1997-06-17 |