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SAO network analysis of patents for technology trends identification: a case study of polymer electrolyte membrane technology in proton exchange membrane fuel cells

Sao Network AnalysisChemical EngineeringElectrical EngineeringEngineeringTechnology Trends IdentificationPatent PoolIndustrial EngineeringPatent AnalysisCase StudyLawProton-exchange MembranePatentabilityBusiness Method PatentTechnologyIntellectual PropertyElectrochemistryTechnology Transfer