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Patent applications and USPTO patent grants for Hopson; Douglas F..The latest application filed is for "coupling with locking bars".
Patent | Date |
---|---|
Coupling with locking bars Grant 9,175,795 - Hopson November 3, 2 | 2015-11-03 |
Coupling With Locking Bars App 20130320673 - HOPSON; DOUGLAS F. | 2013-12-05 |
Coupling with male half having internal pressure relief Grant 6,382,251 - Hopson May 7, 2 | 2002-05-07 |
Balanced coupling with pressure bleed Grant 6,145,539 - Wilcox , et al. November 14, 2 | 2000-11-14 |
Farm coupling Grant 6,116,277 - Wilcox , et al. September 12, 2 | 2000-09-12 |
Coupling with female half having internal pressure relief Grant 6,095,190 - Wilcox , et al. August 1, 2 | 2000-08-01 |
Coupling with filters Grant 5,951,728 - Hopson September 14, 1 | 1999-09-14 |
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