Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6202475 | Predicting logarithmic reduction values | Humphrey John Jardine Drummond, Warren Thomas Johnson | 2001-03-20 |
| 5918264 | Fiber monitoring system | Humphrey John Jardine Drummond, Todd Kenneth Arlon Fischer | 1999-06-29 |
| 5405528 | Modular microporous filter assemblies | Bruce Gregory Biltoft, Philip Guilfoyle, Noel S. D. Wood | 1995-04-11 |
| D335526 | Valve housing | Bruce Gregory Biltoft | 1993-05-11 |
| D334614 | End manifold for a filter cartridge | Bruce Gregory Biltoft | 1993-04-06 |
| 5194149 | Filter cartridge manifold | Bruce Gregory Biltoft | 1993-03-16 |
| D331619 | End manifold for a filter cartridge | Bruce Gregory Biltoft | 1992-12-08 |