Abstract
The aim of this study is to try to find out the wind energy technology status of Germany based on patent analysis. Patent data are provided by Derwent Innovations Index (DII) database of the ISI website during the period of time from 1963 to 2009. For the purpose of observing the patent trends, the major companies, the technology focus etc. in wind fields, multiple methods are used, including technology field classification, patent assignee authority control and various patent indicators. The results show that the development of wind energy technology of Germany is a fast increasing tendency. Enercon Group, Repower Systems, General Electric Company etc. are the main enterprises in wind energy technology field of Germany. The technology focuses of each field and sub-field are also discovered.
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