Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8424381 | Fluid level measuring device | William M. Roberts | 2013-04-23 |
| 5224837 | Apparatus for recovery of liquid hydrocarbon | David F. Bowles | 1993-07-06 |
| D332066 | Control panel for a liquid waste recovery system | David F. Bowles | 1992-12-29 |