Assignee
BALLARD POWER SYSTEMS
CA·348 granted patents·55 pending applications·15,389 citations·filing 1990–2023
Top patents by PatentIndex Score
403 records- 0198US7256566B2Method and apparatus for determining a maximum power point of photovoltaic cellsBALLARD POWER SYSTEMS·Filed 2004·Granted Aug 14, 2007·390 cites·26 claims
- 0298US7158395B2Method and apparatus for tracking maximum power point for inverters, for example, in photovoltaic applicationsBALLARD POWER SYSTEMS·Filed 2004·Granted Jan 2, 2007·380 cites·24 claims
- 0398US6057054AMembrane electrode assembly for an electrochemical fuel cell and a method of making an improved membrane electrode assemblyBALLARD POWER SYSTEMS·Filed 1998·Granted May 2, 2000·293 cites·29 claims
- 0497US6940735B2Power converter systemBALLARD POWER SYSTEMS·Filed 2003·Granted Sep 6, 2005·212 cites·16 claims
- 0597US6555989B1Efficient load-following power generating systemBALLARD POWER SYSTEMS·Filed 2001·Granted Apr 29, 2003·115 cites·22 claims
- 0697US6080503APolymer electrolyte membrane fuel cells and stacks with adhesively bonded layersBALLARD POWER SYSTEMS·Filed 1998·Granted Jun 27, 2000·241 cites·3 claims
- 0797US6066409AElectrochemical fuel cell stack with improved reactant manifolding and sealingBALLARD POWER SYSTEMS·Filed 1998·Granted May 23, 2000·166 cites·13 claims
- 0897US5441821AElectrochemical fuel cell system with a regulated vacuum ejector for recirculation of the fluid fuel streamBALLARD POWER SYSTEMS·Filed 1994·Granted Aug 15, 1995·321 cites·26 claims
- 0997US5300370ALaminated fluid flow field assembly for electrochemical fuel cellsBALLARD POWER SYSTEMS·Filed 1993·Granted Apr 5, 1994·264 cites·17 claims
- 1097US5252410ALightweight fuel cell membrane electrode assembly with integral reactant flow passagesBALLARD POWER SYSTEMS·Filed 1991·Granted Oct 12, 1993·225 cites·31 claims
- 1197US5200278AIntegrated fuel cell power generation systemBALLARD POWER SYSTEMS·Filed 1991·Granted Apr 6, 1993·274 cites·20 claims
- 1296US7087327B2Electric power plant with adjustable array of fuel cell systemsBALLARD POWER SYSTEMS·Filed 2003·Granted Aug 8, 2006·80 cites·23 claims
- 1396US6603672B1Power converter systemBALLARD POWER SYSTEMS·Filed 2000·Granted Aug 5, 2003·272 cites·7 claims
- 1496US6495278B1Polymer electrolyte membrane electrochemical fuel cells and stacks with adhesively bonded layersBALLARD POWER SYSTEMS·Filed 2000·Granted Dec 17, 2002·91 cites·32 claims
- 1596US6106964ASolid polymer fuel cell system and method for humidifying and adjusting the temperature of a reactant streamBALLARD POWER SYSTEMS·Filed 1998·Granted Aug 22, 2000·219 cites·10 claims
- 1696US5484666AElectrochemical fuel cell stack with compression mechanism extending through interior manifold headersBALLARD POWER SYSTEMS·Filed 1994·Granted Jan 16, 1996·204 cites·27 claims
- 1796US5464700AGasketed membrane electrode assembly for electrochemical fuel cellsBALLARD POWER SYSTEMS·Filed 1994·Granted Nov 7, 1995·228 cites·16 claims
- 1896US5366818ASolid polymer fuel cell systems incorporating water removal at the anodeBALLARD POWER SYSTEMS·Filed 1992·Granted Nov 22, 1994·214 cites·54 claims
- 1996US5360679AHydrocarbon fueled solid polymer fuel cell electric power generation systemBALLARD POWER SYSTEMS·Filed 1993·Granted Nov 1, 1994·304 cites·13 claims
- 2095US6586128B1Differential pressure fluid flow fields for fuel cellsBALLARD POWER SYSTEMS·Filed 2000·Granted Jul 1, 2003·71 cites·27 claims
- 2195US6496393B1Integrated traction inverter module and bi-directional DC/DC converterBALLARD POWER SYSTEMS·Filed 2001·Granted Dec 17, 2002·114 cites·12 claims
- 2295US5798186AMethod and apparatus for commencing operation of a fuel cell electric power generation system below the freezing temperature of waterBALLARD POWER SYSTEMS·Filed 1996·Granted Aug 25, 1998·227 cites·27 claims
- 2395US5789091AElectrochemical fuel cell stack with compression bandsBALLARD POWER SYSTEMS·Filed 1996·Granted Aug 4, 1998·152 cites·17 claims
- 2495US5482680AElectrochemical fuel cell assembly with integral selective oxidizerBALLARD POWER SYSTEMS·Filed 1993·Granted Jan 9, 1996·110 cites·18 claims
- 2595US5366821AConstant voltage fuel cell with improved reactant supply and control systemBALLARD POWER SYSTEMS·Filed 1992·Granted Nov 22, 1994·241 cites·23 claims
- 2694US6723758B2Graft polymeric membranes and ion-exchange membranes formed therefromBALLARD POWER SYSTEMS·Filed 2001·Granted Apr 20, 2004·95 cites·10 claims
- 2794US6416895B1Solid polymer fuel cell system and method for humidifying and adjusting the temperature of a reactant streamBALLARD POWER SYSTEMS·Filed 2000·Granted Jul 9, 2002·61 cites·15 claims
- 2894US6171374B1Plate and frame fluid exchanging assembly with unitary plates and sealsBALLARD POWER SYSTEMS·Filed 1999·Granted Jan 9, 2001·171 cites·44 claims
- 2994US5976726AElectrochemical cell with fluid distribution layer having integral sealing capabilityBALLARD POWER SYSTEMS·Filed 1997·Granted Nov 2, 1999·83 cites·30 claims
- 3094US5527363AMethod of fabricating an embossed fluid flow field plateBALLARD POWER SYSTEMS·Filed 1993·Granted Jun 18, 1996·130 cites·8 claims
- 3194US5514487AEdge manifold assembly for an electrochemical fuel cell stackBALLARD POWER SYSTEMS·Filed 1994·Granted May 7, 1996·160 cites·22 claims
- 3293US7011902B2Black start method and apparatus for a fuel cell power plant, and fuel cell power plant with black start capabilityBALLARD POWER SYSTEMS·Filed 2003·Granted Mar 14, 2006·60 cites·41 claims
- 3393US6890218B2Three-phase connector for electric vehicle drivetrainBALLARD POWER SYSTEMS·Filed 2003·Granted May 10, 2005·79 cites·19 claims
- 3493US6864005B2Membrane exchange humidifier for a fuel cellBALLARD POWER SYSTEMS·Filed 2001·Granted Mar 8, 2005·88 cites·16 claims
- 3593US6756149B2Electrochemical fuel cell with non-uniform fluid flow designBALLARD POWER SYSTEMS·Filed 2001·Granted Jun 29, 2004·53 cites·15 claims
- 3693US6724194B1Cell voltage monitor for a fuel cell stackBALLARD POWER SYSTEMS·Filed 2000·Granted Apr 20, 2004·60 cites·29 claims
- 3793US6461751B1Method and apparatus for operating a fuel cellBALLARD POWER SYSTEMS·Filed 1999·Granted Oct 8, 2002·166 cites·29 claims
- 3893US6423439B1Membrane electrode assembly for an electrochemical fuel cellBALLARD POWER SYSTEMS·Filed 2000·Granted Jul 23, 2002·62 cites·14 claims
- 3993US5773160AElectrochemical fuel cell stack with concurrent flow of coolant and oxidant streams and countercurrent flow of fuel and oxidant streamsBALLARD POWER SYSTEMS·Filed 1996·Granted Jun 30, 1998·143 cites·18 claims
- 4093US5672439AMethod and apparatus for reducing reactant crossover in an electrochemical fuel cellBALLARD POWER SYSTEMS·Filed 1995·Granted Sep 30, 1997·106 cites·24 claims
- 4193US5422411ATrifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefromBALLARD POWER SYSTEMS·Filed 1993·Granted Jun 6, 1995·123 cites·8 claims
- 4292US10892509B2Compression apparatus for fuel cell stackBALLARD POWER SYSTEMS·Filed 2016·Granted Jan 12, 2021·6 cites·14 claims
- 4392US6987670B2Dual power module power system architectureBALLARD POWER SYSTEMS·Filed 2003·Granted Jan 17, 2006·78 cites·33 claims
- 4492US6716550B1Sealing membrane electrode assemblies for electrochemical fuel cellsBALLARD POWER SYSTEMS·Filed 2002·Granted Apr 6, 2004·68 cites·16 claims
- 4592US6636429B2EMI reduction in power modules through the use of integrated capacitors on the substrate levelBALLARD POWER SYSTEMS·Filed 2001·Granted Oct 21, 2003·62 cites·4 claims
- 4692US6596427B1Encapsulating seals for electrochemical cell stacks and methods of sealing electrochemical cell stacksBALLARD POWER SYSTEMS·Filed 2000·Granted Jul 22, 2003·107 cites·27 claims
- 4792US6479177B1Method for improving the cold starting capability of an electrochemical fuel cellBALLARD POWER SYSTEMS·Filed 1999·Granted Nov 12, 2002·111 cites·14 claims
- 4892US6444179B1Autothermal reformerBALLARD POWER SYSTEMS·Filed 2000·Granted Sep 3, 2002·49 cites·39 claims
- 4992US6190793B1Electrochemical fuel cell stack with an improved compression assemblyBALLARD POWER SYSTEMS·Filed 1998·Granted Feb 20, 2001·92 cites·35 claims
- 5092US5993987AElectrochemical fuel cell stack with compression bandsBALLARD POWER SYSTEMS·Filed 1998·Granted Nov 30, 1999·115 cites·21 claims
Showing the top 50 of 403 patent records by PatentIndex Score.
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