专利技术特征是专利价值生成的重要因素。现有研究通常假定技术创新相互独立，忽视同一区域技术创新之间存在的关联。本研究以中国知识产权局1985-2009年间授权的战略新兴产业专利为研究对象，分析包括区域技术差异在内的多种专利技术特征对专利价值的影响。将专利存续期作为专利价值的代理变量，估计专利生存函数发现：中美日三国在各技术子领域的专利价值与其在该领域的技术相对优（劣）势有明显关联，而与技术领域本身的相关性并不明显。随后建立COX风险回归模型进行量化研究,结果显示：相比于技术领域因素，区域技术差异对专利价值生成更具显著且稳定的影响。区域技术优势能够促进专利维持并最终提升专利价值。

The technological characteristics of patents are important factors when considering patent value generation. Researchers often assume that innovations are independent from each other and neglect the connection between innovations in the same region. We analyze the relationship between patent value and several technical feature, especially regional technical differences. Strategic emerging industries patents issued by State Intellectual Property Office of China during the period of 1985-2009 are selected as the research object. Patent survival function is estimated using the patent renewal duration as the proxy variable of patent value. The results show that there is a strong connection between three countries’ patent value and its relatively superior (inferior) technical status in each technical sub-area, while the relationship between patent value and technology affiliation is not so obvious. Subsequently, we construct a COX risk regression model to determine the quantitative relationship between regional technological differences and patent value. It can be concluded that regional technological differences have more significant and stable influence on patent value than technology affiliation factor , and the revealed technological advantage will promote patent maintenance and ultimately enhance patent value.