关键词: 专利许可, 二手产品, 竞争策略, 闭环供应链

Abstract: Aiming at the problem of patent protection for second-hand products,the competition strategies of closed-loop supply chain were researched.Underthe heterogeneous demand circumstance with new products,remanufactured products and second-hand products,the competition decision modelsof closed-loop supply chain were builtwhich considered patent license or non-license,and the optimal strategies were obtained.The influence of different parameters on product sales and closed-loop supply chain profitswas analyzed by the comparative study and example simulation.Research showed that the total market shares could be always expanded when the renovation added cost value was smaller in the competitive circumstance without the patent protection,the second-handdealer,retailerand closed-loop supply chain had a vast profit space,but the original manufacture faced the second-handdealer's profit occupation.In the competitive circumstance with patent license,the market total shares were reduced due to the restriction of patent protection,and the profit spaces of the second-handdealer,retailer and closed-loop supply chain were compressed.Only when the renovation added cost value was bigger,the second-hand dealer would choose patent license.

Key words: patent license, second-hand products, competition strategy, closed-loop supply chain