Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4618431 | Method for stabilizing the relationship between the filtering unit and a filter feed pump | David B. Hindman, Joseph D. Lima | 1986-10-21 |
| 4482461 | Backwash control for constant volume-pressure filtration system | David B. Hindman, Norman E. Wood, David N. Foster, D. Stephans Damtoft, Jr. | 1984-11-13 |