清洁技术企业的创新方案往往具有跨领域和多层次的特点，专利组合是这类企业全面保护其创新方案和获取持续竞争力的必要与有力工具。案例分析风能领域典型企业专利组合的构建过程，证实专利组合的构建必须基于技术发展趋势和竞争态势的把握，同时揭示清洁技术企业专利组合策略的一般模式。而对“碳捕获和封存”领域专利文献的分析发现，专利组合分析方法可以对拟研究领域内的技术及竞争情况进行有效监控，为企业建立专利组合提供多层面的可视化情报信息。

Innovative solutions?in clean technology enterprises?have?the characteristics of?cross-discipline and multilevel. For those kinds of enterprises, patent portfolio is a necessary and powerful tool to protect their innovations and obtain the sustainable competitiveness. A case study on the construction process?of patent portfolio?of a typical wind energy enterprise shows that building an effective patent portfolio must be based on good understanding of both development trend and competition state of technology. Also, a general?pattern of patent portfolio strategy in clean technology enterprises is?revealed by the case.?While, through the analysis of the patent literature on carbon capture and sequestration field, it is found that patent portfolio analysis can be applied to monitor the technology and competitive state of the field concerned by providing multi-layered visual information and intelligence for the the construction of patent portfolio in clean technology enterprises.