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.
通过对美国专利商标局（USPTO）专利数据库检索过程的实例说明，介绍该专利网络检索方法，供用户在检索美国专利文献时参考与使用。
The methods for USPTO patent database searching were introduced by examples, so as to be used to search patents in United States.
提出一种建立WPI专利文献二次数据库的新方法并对专利文献进行计算机量化分析。
This paper presented a new method for quantitatively analyzing the secondary data - base of WPI.
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