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The choice of patent experts, only STN offers access to trusted scientific and technical information including the authoritative chemistry content from CAS and patent content from Thomson Reuters’ Derwent World Patents Index® and the various INPADOC databases on a single platform. Celebrating its 30th anniversary this year, intellectual property professionals and patent examiners at the world’s major patent offices and research organizations rely on STN for their information needs. STN is operated jointly by CAS and FIZ Karlsruhe worldwide. Learn more at www.stn.org , www.stn-international.de