Espacenet. New Espacenet is here Why not move to the new interface and get started right away?
Key features: Enjoy a seamless search experience and an application that adapts to the size/format of your devices Search in all data, including full text, per default See your search query at all times and refine it whenever you want Browse the entire result list with abstract snippets and/or drawings Navigate the result list and document details at the same time Build your query intuitively using Advanced search Filter your results according to predefined categories and run statistical analyses. WIPO Patentscope. STN International. Patent Lens. Patent Search Engines.