# '''[[GE Energy]]'''
= IP Search & Analysis =
== Doubly-fed Induction Generator: Search Strategy ==
The present study on the IP activity in the area of horizontal axis wind turbines with focus on '''''Doubly-fed Induction Generator (DFIG)''''' is based on a search conducted on Thomson Innovation.
===Control Patents===
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===Patent Classes===
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===Concept Table==
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|align = "center" bgcolor = "#4F81BD" rowspan = "2" width="38"|<font color="#FFFFFF">'''S. No.'''</font>
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===Thomson Innovation Search===
'''Database:''' Thomson Innovation<br>
'''Patent coverage:''' US EP WO JP DE GB FR CN KR DWPI<br>