Patent Offices and Authorities

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» German Patent and Trademark Office (GPTO)
» European Patent Office (EPO)
» United States Patent and Trademark Office (USPTO)
» Japanese Patent Office (JPO)
» World Intellectual Property Organization (WIPO)
» Office for Harmonization in the Internal Market (OHIM)
» Federal Patent Court (BPatG)
» Korean Patent Office (KIPO)
» Chinese Patent Office (SIPO)

» German Patent Information System (DEPATIS)
» esp@cenet
» US-Patent Full-Text and Full-Page Image Databases

» PATON – Patent information of Ilmenau University of Technology
» Delphion
» Derwent – Patent and Scientific Information Provider
» STNeasy – Scientific & Technical Information Network
» Thomson Reuters

» German Patent Attorneys Association (PAK)
» Institute of Professional Representatives before the European Office (epi)