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Patent applications and USPTO patent grants for Bratu; Christian.The latest application filed is for "progressive cavity pump".
Patent | Date |
---|---|
Progressive cavity pump with uncoupled natural frequency Grant 9,506,468 - Bratu November 29, 2 | 2016-11-29 |
Progressive Cavity Pump App 20150139842 - Bratu; Christian | 2015-05-21 |
Combined pump with rotodynamic impeller Grant 7,578,663 - Bratu August 25, 2 | 2009-08-25 |
Progressing cavity pump Grant 7,413,416 - Bratu August 19, 2 | 2008-08-19 |
Combined Pump App 20070292287 - Bratu; Christian | 2007-12-20 |
Progressing cavity pump App 20050169779 - Bratu, Christian | 2005-08-04 |
Multiphase fluid pumping or compression device with blades of tandem design Grant 6,149,385 - Vilagines , et al. November 21, 2 | 2000-11-21 |
Multiphase fluid pumping or compression device with blades of tandem design Grant 5,885,058 - Vilagines , et al. March 23, 1 | 1999-03-23 |
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