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Enlace: http://es.espacenet.com/search97cgi/s97_cgi.exe?Action=FormGen&Template=es/ES/home.hts

Descripción: esp@cenet is a free online service for searching patents and patent applications. esp@cenet was developed by the European Patent Office (EPO) together with the member states of the European Patent Organisation. Every member state has an esp@cenet service in its national language, and access to the EPO's worldwide database, most of which is in English. By the end of 2006, the esp@cenet worldwide service contained records on almost 60 million patent publications.