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Constructing a weighted keyword-based patent network approach to identify technological trends and evolution in a field of green energy: a case of biofuels

Patent PoolEngineeringTechnological TrendsSustainable EnergyPatent AnalysisEnergy TransitionEco-innovationEnergy PolicyAgricultural EconomicsBusinessGreen EnergyLawGreen InnovationPatentabilityTechnologySustainable ProductionIntellectual PropertyTechnology Transfer