中文摘要：

德温特专利数据库，收集了世界上主要国家、地区的专利数据，是当前专利信息分析的主要数据来源之一。德温特手工代码，作为该数据库的一大特色功能，按分层结构排列，具有类似于文献中“关键词”和“叙词表”的功能，故而将德温特手工代码共现法，拓展到专利地图中，并以华为技术有限公司的PCT专利数据为例，进行了实证分析，以期证明该方法在研究专利权人的技术布局方面的有效性。

英文摘要：

Derwent innovation index, covering the most patents in the main countries or regions, was one of the databases frequently used. Derwent manual code, a feature of the database, was arranged with layered structure, with the function as ＂keywords＂ or ＂thesaurus＂ has in the academic paper. So the paper extended Derwent manual code co-occurrence to patent map, and took the PCT patents of Huawei technologies company as example to demonstrate its effectiveness in describing the assignee＇s technology focuses .