Patentes

Páginas webs para buscar información, patentes, papers, etc..

http://search.carrotsearch.com/carrot2-webapp/search
http://www.touchgraph.com/navigator
http://databank.worldbank.org/data/home.aspx
http://worldwide.espacenet.com/
https://patentscope.wipo.int/search/en/search.jsf
http://wwwen.zte.com.cn/en/
www.google.com/patents
scholar.google.com