Powell; Douglas Hunter
Patent Applications and Registrations
Patent applications and USPTO patent grants for Powell; Douglas Hunter.The latest application filed is for "shutoff valve in backflow prevention device".
- Powell; Douglas Hunter - Eldorado Hills CA
- Powell; Douglas Hunter - El Macero CA
| Patent | Date |
|---|---|
| Lock and load control arm Grant 9,174,504 - Powell November 3, 2 | 2015-11-03 |
| Shutoff valve in backflow prevention device Grant 8,887,756 - Powell November 18, 2 | 2014-11-18 |
| Check valve in backflow prevention device Grant 8,875,733 - Powell November 4, 2 | 2014-11-04 |
| Access cover in backflow prevention device Grant 8,844,562 - Powell September 30, 2 | 2014-09-30 |
| Check Valve In Backflow Prevention Device App 20140150904 - Powell; Douglas Hunter | 2014-06-05 |
| Shutoff Valve In Backflow Prevention Device App 20140150893 - Powell; Douglas Hunter | 2014-06-05 |
| Access Cover In Backflow Prevention Device App 20140150892 - Powell; Douglas Hunter | 2014-06-05 |
| Long travel shock absorber Grant 8,714,321 - Powell May 6, 2 | 2014-05-06 |
| Long Travel Shock Absorber App 20120306133 - Powell; Douglas Hunter | 2012-12-06 |
| Adjustable modular orthopedic implant Grant 5,906,644 - Powell May 25, 1 | 1999-05-25 |
| Adjustable modular orthopedic implant Grant 5,876,459 - Powell March 2, 1 | 1999-03-02 |
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