Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8393346 | Solenoid valve and method of assembly thereof | Donald Edwin Hargraves, Nathan Davis | 2013-03-12 |
| 8096043 | Method of assembling a pump motor and preloading bearings of the motor | Donald Edwin Hargraves | 2012-01-17 |
| 7762796 | Pump valve with controlled stroke | Donald Edwin Hargraves | 2010-07-27 |
| 7401543 | Pump sealing apparatus | — | 2008-07-22 |