Assignee
NAT COUPLING CO INC
US·92 granted patents·7 pending applications·2,582 citations·filing 1985–2025
Top patents by PatentIndex Score
99 records- 0198US4694859AUndersea hydraulic coupling and metal sealNAT COUPLING CO INC·Filed 1985·Granted Sep 22, 1987·142 cites·21 claims
- 0297US5099882APressure balanced hydraulic coupling with metal sealsNAT COUPLING CO INC·Filed 1991·Granted Mar 31, 1992·119 cites·50 claims
- 0396US6575430B1Hydraulic coupling with dovetail seal having multiple radial sealing surfacesNAT COUPLING CO INC·Filed 2002·Granted Jun 10, 2003·74 cites·20 claims
- 0496US5203374APressure balanced hydraulic coupling with metal sealsNAT COUPLING CO INC·Filed 1991·Granted Apr 20, 1993·92 cites·11 claims
- 0595US11614187B2Undersea hydraulic coupling with multiple pressure-energized metal sealsNAT COUPLING CO INC·Filed 2020·Granted Mar 28, 2023·7 cites·20 claims
- 0695US6206040B1Undersea hydraulic couplingNAT COUPLING CO INC·Filed 2000·Granted Mar 27, 2001·57 cites·11 claims
- 0795US6179002B1Hydraulic coupling with pressure-energized dovetail sealNAT COUPLING CO INC·Filed 2000·Granted Jan 30, 2001·63 cites·20 claims
- 0894US10400541B2Undersea hydraulic coupling with multiple pressure-energized metal sealsNAT COUPLING CO INC·Filed 2017·Granted Sep 3, 2019·13 cites·6 claims
- 0993US10054239B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2017·Granted Aug 21, 2018·5 cites·17 claims
- 1093US5052439AUndersea hydraulic coupling with dovetail sealNAT COUPLING CO INC·Filed 1989·Granted Oct 1, 1991·80 cites·7 claims
- 1192US7762824B2Hydraulic coupling member with electrical bonding contractorNAT COUPLING CO INC·Filed 2007·Granted Jul 27, 2010·25 cites·42 claims
- 1292US7159616B2Dual path hydraulic couplingNAT COUPLING CO INC·Filed 2005·Granted Jan 9, 2007·46 cites·19 claims
- 1391US12173824B2Hydraulic coupling with dovetail seal having multiple radial sealing surfaces and inner biasing elementNAT COUPLING CO INC·Filed 2023·Granted Dec 24, 2024·1 cites·19 claims
- 1491US10174857B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2018·Granted Jan 8, 2019·4 cites·5 claims
- 1591US7303194B2Seal retainer with pressure energized metal seal members for undersea hydraulic couplingNAT COUPLING CO INC·Filed 2003·Granted Dec 4, 2007·36 cites·14 claims
- 1691US6962347B2Metal backup seal for undersea hydraulic couplingNAT COUPLING CO INC·Filed 2002·Granted Nov 8, 2005·43 cites·20 claims
- 1791US6923476B2Floating seal for undersea hydraulic couplingNAT COUPLING CO INC·Filed 2003·Granted Aug 2, 2005·38 cites·5 claims
- 1891US5829480ALocking device for undersea hydraulic couplingNAT COUPLING CO INC·Filed 1997·Granted Nov 3, 1998·74 cites·11 claims
- 1991US5390702AUndersea hydraulic coupling with pre-sealing guidanceNAT COUPLING CO INC·Filed 1994·Granted Feb 21, 1995·74 cites·20 claims
- 2090US9810336B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2016·Granted Nov 7, 2017·5 cites·16 claims
- 2189US6106026ALocking device for undersea hydraulic couplingNAT COUPLING CO INC·Filed 1999·Granted Aug 22, 2000·63 cites·5 claims
- 2289US5339861AHydraulic coupling with hollow metal o-ring sealNAT COUPLING CO INC·Filed 1993·Granted Aug 23, 1994·64 cites·13 claims
- 2389US4915419ASliding lock plate for hydraulic connectorsNAT COUPLING CO INC·Filed 1988·Granted Apr 10, 1990·65 cites·11 claims
- 2489US4900071AUndersea hydraulic coupling with dovetail sealNAT COUPLING CO INC·Filed 1988·Granted Feb 13, 1990·68 cites·15 claims
- 2588US9145983B2Dummy undersea hydraulic coupling memberNAT COUPLING CO INC·Filed 2013·Granted Sep 29, 2015·9 cites·19 claims
- 2688US6202691B1Undersea hydraulic coupling with bleed portNAT COUPLING CO INC·Filed 2000·Granted Mar 20, 2001·39 cites·19 claims
- 2788US4884584AInternally preloaded metal-to-metal seal hydraulic connectorNAT COUPLING CO INC·Filed 1987·Granted Dec 5, 1989·54 cites·24 claims
- 2887US12173576B2Regulator having check valve manifold for use in subsea control circuitNAT COUPLING CO INC·Filed 2023·Granted Dec 24, 2024·1 cites·22 claims
- 2987US6474359B1Undersea hydraulic coupling memberNAT COUPLING CO INC·Filed 2000·Granted Nov 5, 2002·36 cites·10 claims
- 3087US6227245B1Undersea hydraulic coupling with internal guard for flow portNAT COUPLING CO INC·Filed 2000·Granted May 8, 2001·34 cites·13 claims
- 3186US5232021AProbe member for undersea hydraulic couplingNAT COUPLING CO INC·Filed 1992·Granted Aug 3, 1993·61 cites·17 claims
- 3286US4813454AUndersea coupling with pressure balancing portsNAT COUPLING CO INC·Filed 1987·Granted Mar 21, 1989·44 cites·15 claims
- 3385US7913974B2Hydraulic coupling with smooth bore poppet valveNAT COUPLING CO INC·Filed 2008·Granted Mar 29, 2011·14 cites·18 claims
- 3485US6626207B1Undersea hydraulic coupling with interlocking poppet valve actuatorsNAT COUPLING CO INC·Filed 2002·Granted Sep 30, 2003·31 cites·12 claims
- 3584US10415715B2Subsea BOP control system with dual-action check valveNAT COUPLING CO INC·Filed 2018·Granted Sep 17, 2019·2 cites·4 claims
- 3684US7520291B2Pressure-compensated, subsea chemical injection valveNAT COUPLING CO INC·Filed 2006·Granted Apr 21, 2009·14 cites·17 claims
- 3784US5355909AUndersea hydraulic coupling with metal sealsNAT COUPLING CO INC·Filed 1994·Granted Oct 18, 1994·53 cites·16 claims
- 3883US7111874B2Floating seal for undersea hydraulic couplingNAT COUPLING CO INC·Filed 2005·Granted Sep 26, 2006·11 cites·15 claims
- 3983US7063328B2Undersea hydraulic coupling with seal retainerNAT COUPLING CO INC·Filed 2002·Granted Jun 20, 2006·28 cites·18 claims
- 4083US4817668AIntegral metal seal for hydraulic couplingNAT COUPLING CO INC·Filed 1987·Granted Apr 4, 1989·39 cites·17 claims
- 4182US7163190B2Undersea hydraulic coupling member and seal retainerNAT COUPLING CO INC·Filed 2002·Granted Jan 16, 2007·27 cites·17 claims
- 4282US6237632B1Undersea hydraulic coupling member with primary and secondary poppet valvesNAT COUPLING CO INC·Filed 2000·Granted May 29, 2001·28 cites·18 claims
- 4381US10557577B2Subsea hydraulic coupling with metal bore linerNAT COUPLING CO INC·Filed 2017·Granted Feb 11, 2020·3 cites·26 claims
- 4481US6375153B2Undersea hydraulic couplingNAT COUPLING CO INC·Filed 2000·Granted Apr 23, 2002·21 cites·7 claims
- 4581US5284183AHydraulic coupler with radial metal sealNAT COUPLING CO INC·Filed 1993·Granted Feb 8, 1994·40 cites·5 claims
- 4680US7575256B2Bore liner for undersea hydraulic couplingNAT COUPLING CO INC·Filed 2003·Granted Aug 18, 2009·24 cites·20 claims
- 4780US6123103APressure balanced coupling with split bodyNAT COUPLING CO INC·Filed 1999·Granted Sep 26, 2000·41 cites·20 claims
- 4880US6095191AUndersea hydraulic coupling with tapered probeNAT COUPLING CO INC·Filed 1998·Granted Aug 1, 2000·44 cites·12 claims
- 4979US6085785AUndersea hydraulic coupling with extended probe sectionNAT COUPLING CO INC·Filed 1999·Granted Jul 11, 2000·44 cites·20 claims
- 5079US5762106AUndersea hydraulic coupling and metal sealNAT COUPLING CO INC·Filed 1991·Granted Jun 9, 1998·40 cites·16 claims
Showing the top 50 of 99 patent records by PatentIndex Score.
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