Nowadays, online patent databases make patent retrieval more convenient, while patent analysis tools make patent analysis more efficient.
网上专利数据库方便了专利信息的检索，而相应专利分析软件的出现又使得专利分析更加快捷有效。
Introduces the web sites and contents of patent databases well-known at home and abroad as well as the free retrieval of patent information on the Internet.
重点介绍因特网上国内外著名的专利数据库的网址、内容和专利文献的免费检索方法。
Introduces the web sites and contents of patent databases well-known at home and abroad as well as the free retrieval of patent information on the Internet.
重点介绍因特网上国内外著名的专利数据库的网址、内容和专利文献的免费检索方法。
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