This paper introduces the China patent online search system of SIPO and CNPAT, and makes a full comparison and evaluation between them in the aspects of their covering range and retrieval methods.

• 主要介绍了“国家知识产权局专利检索系统”和“中国专利信息中心专利检索系统”，从收录内容和检索方式上对这两个专利检索系统作详细的分析、比较和评价，以便于用户选择使用。