Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12358256 | Pipe liner | Alexander C. Johnson | 2025-07-15 |
| 12251887 | Sealing of pipe liners | Alexander C. Johnson | 2025-03-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12358256 | Pipe liner | Alexander C. Johnson | 2025-07-15 |
| 12251887 | Sealing of pipe liners | Alexander C. Johnson | 2025-03-18 |