Vestas Wind Systems is a Danish manufacturer, seller, installer, and servicer of wind turbines. It is the largest in the world, but due to very rapid growth of its competitors – GE  (US), Sinovel (China), Enercom (Germany), and Gamesa (Spain) – its market share decreased from 28% in 2007 to 12.5% in 2009. Vestas has installed over 41,000 wind turbines in 63 countries on five continents. The company employs more than 22,000 people globally, and has built production facilities in more than 12 countries.

Vestas spent €92 million ($128 million), or 1.4% of revenue, on research and development in 2009. It has filed 787 wind turbine patents (165 in 2009) according to United Kingdom Intellectual Property Office (UK-IPO), while General Electric has 666 and Siemens Wind Power has 242. In October 2009, Vestas and QinetiQ claimed a successful test of a stealth wind turbine blade mitigating radar reflection problems for aviation.


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