Changes
/* Insights */
* The key patents in the field are held by [http://www.windpoweringamerica.gov/wind_installed_capacity.asp US Windpower], [http://www.oregon.gov/ENERGY/RENEW/Wind/windhome.shtml Oregon State] and [http://www.vestas.com/ Vestas Wind Energy Systems].
[[Image:wind_top_cited.png|center|thumb|700px|Key Patents]]
* Patenting activity has seen a very high growth rate in the last two years.
[[Image:wind_pat_act.png|center|700px]]
== Geographical Activity ==
* USA, China, Germany, Spain, and India are very active in wind energy research.
[[Image:wind_geographical_act.png|center|thumb|700px|Geographical Activity]]
* Around 86% patents are on controlling the doubly-fed induction generation(DFIG) which indicates high research activity going on in rating and controlling of the DFIG systems.
