Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10167213 | Aeration control valve system with bypass gas release passage for water treatment system and methods for using same | — | 2019-01-01 |
| 9701554 | Aeration control valve system for water treatment system and methods for using same | — | 2017-07-11 |
| 9290397 | Aeration control valve system for water treatment system and methods for using same | — | 2016-03-22 |
| 8691091 | Aeration control valve system for water treatment system and methods for using same | — | 2014-04-08 |
| 8393875 | Pressure-controlled liquid supply system and pump control device for use therein | — | 2013-03-12 |
| 8328162 | Pivotable control valve assembly for water treatment device | Perrin T. Prescott | 2012-12-11 |
| 6372024 | System and method for removing contaminating gases from water | Perrin T. Prescott | 2002-04-16 |
| 5624237 | Pump overload control assembly | Perrin T. Prescott | 1997-04-29 |