Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5591067 | Sealed waste transfer system for vacuum blasting | William S. McPhee | 1997-01-07 |
| 5529530 | Sealed waste transfer system for vacuum blasting | William S. McPhee | 1996-06-25 |