Berry; Douglas W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Berry; Douglas W..The latest application filed is for "tandem progressive cavity pumps".
- Berry; Douglas W. - Broken Arrow OK
| Patent | Date |
|---|---|
| Tandem progressive cavity pumps Grant 8,726,981 - Berry May 20, 2 | 2014-05-20 |
| Bottom tag for progressing cavity pump rotor with coiled tubing access Grant 8,333,244 - Johnson , et al. December 18, 2 | 2012-12-18 |
| Tandem Progressive Cavity Pumps App 20120305263 - Berry; Douglas W. | 2012-12-06 |
| Insertable Surface-driven Pump App 20110284238 - Berry; Douglas W. ; et al. | 2011-11-24 |
| Bottom Tag for Progressing Cavity Pump Rotor with Coiled Tubing Access App 20110094730 - Johnson; Nicholas D. ; et al. | 2011-04-28 |
| Tubing driven progressing cavity pump and method of pumping well fluid from a well Grant 7,628,209 - Berry , et al. December 8, 2 | 2009-12-08 |
| Tubing driven progressing cavity pump App 20070209800 - Berry; Douglas W. ; et al. | 2007-09-13 |
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