Assignee
NORTHERN POWER SYSTEMS INC
US·23 granted patents·3 pending applications·1,432 citations·filing 1986–2018
Top patents by PatentIndex Score
26 records- 0198US7377750B1Lightning protection system for a wind turbineNORTHERN POWER SYSTEMS INC·Filed 2005·Granted May 27, 2008·76 cites·22 claims
- 0297US7431567B1Wind turbine having a direct-drive drivetrainNORTHERN POWER SYSTEMS INC·Filed 2004·Granted Oct 7, 2008·154 cites·10 claims
- 0396US7489046B2Water turbine system and method of operationNORTHERN POWER SYSTEMS INC·Filed 2006·Granted Feb 10, 2009·40 cites·5 claims
- 0496US7183665B2Direct drive wind turbineNORTHERN POWER SYSTEMS INC·Filed 2006·Granted Feb 27, 2007·90 cites·16 claims
- 0596US7119453B2Direct drive wind turbineNORTHERN POWER SYSTEMS INC·Filed 2006·Granted Oct 10, 2006·61 cites·19 claims
- 0696US7109600B1Direct drive wind turbineNORTHERN POWER SYSTEMS INC·Filed 2006·Granted Sep 19, 2006·90 cites·14 claims
- 0796US5320491AWind turbine rotor aileronNORTHERN POWER SYSTEMS INC·Filed 1992·Granted Jun 14, 1994·136 cites·35 claims
- 0895US7939957B2Water turbine system and method of operationNORTHERN POWER SYSTEMS INC·Filed 2010·Granted May 10, 2011·16 cites·7 claims
- 0995US7737570B2Water turbine system and method of operationNORTHERN POWER SYSTEMS INC·Filed 2009·Granted Jun 15, 2010·34 cites·22 claims
- 1095US7075192B2Direct drive wind turbineNORTHERN POWER SYSTEMS INC·Filed 2004·Granted Jul 11, 2006·103 cites·14 claims
- 1194US7355309B2Permanent magnet rotor for a direct drive generator or a low speed motorNORTHERN POWER SYSTEMS INC·Filed 2005·Granted Apr 8, 2008·31 cites·10 claims
- 1293US5354175AWind turbine rotor hub and teeter jointNORTHERN POWER SYSTEMS INC·Filed 1993·Granted Oct 11, 1994·120 cites·17 claims
- 1392US6693409B2Control system for a power converter and method of controlling operation of a power converterNORTHERN POWER SYSTEMS INC·Filed 2002·Granted Feb 17, 2004·101 cites·51 claims
- 1491US7891941B2Wind turbine having a direct-drive drivetrainNORTHERN POWER SYSTEMS INC·Filed 2008·Granted Feb 22, 2011·23 cites·17 claims
- 1591US7492617B2Frequency control and power balancing in disturbed power inverter system and method thereofNORTHERN POWER SYSTEMS INC·Filed 2007·Granted Feb 17, 2009·38 cites·17 claims
- 1690US4792281AWind turbine pitch control hubNORTHERN POWER SYSTEMS INC·Filed 1986·Granted Dec 20, 1988·59 cites·2 claims
- 1786US7462955B2Electrical power distribution system and method thereofNORTHERN POWER SYSTEMS INC·Filed 2007·Granted Dec 9, 2008·53 cites·34 claims
- 1886US7145266B2Parallel-connected inverters with separate controllers having impedance current regulatorsNORTHERN POWER SYSTEMS INC·Filed 2004·Granted Dec 5, 2006·61 cites·32 claims
- 1984US10224831B1Control systems, methods, and software for keeping power converters within operating limits during disturbancesNORTHERN POWER SYSTEMS INC·Filed 2018·Granted Mar 5, 2019·6 cites·30 claims
- 2083US5527152AAdvanced wind turbine with lift cancelling aileron for shutdownNORTHERN POWER SYSTEMS INC·Filed 1994·Granted Jun 18, 1996·50 cites·28 claims
- 2181US7692938B2Multiphase power converters and multiphase power converting methodsNORTHERN POWER SYSTEMS INC·Filed 2007·Granted Apr 6, 2010·16 cites·27 claims
- 2281US7333352B2Frequency control and power balancing in disturbed power inverter system and method thereofNORTHERN POWER SYSTEMS INC·Filed 2005·Granted Feb 19, 2008·18 cites·14 claims
- 2376US5527151AAdvanced wind turbine with lift-destroying aileron for shutdownNORTHERN POWER SYSTEMS INC·Filed 1992·Granted Jun 18, 1996·56 cites·8 claims
- 2455US2016285349A1Module-Handling Tool for Installing/Removing Modules Into/From an Electromagnetic Rotary Machine Having a Modularized Active PortionNORTHERN POWER SYSTEMS INC·Filed 2016·Application pending·0 cites
- 2542US2009079266A1Electrical Power Distribution System and Method ThereofNORTHERN POWER SYSTEMS INC·Filed 2008·Application pending·0 cites
- 2640US2008048456A1Modular microturbine systemNORTHERN POWER SYSTEMS INC·Filed 2006·Application pending·0 cites
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