| U.S. Copyright Office - General information and publications.
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| Canadian Patents Database - Search, retrieve and study more than 1,400,000 patent documents. From the Canadian Intellectual Property Office.
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| European Patent Office - This is the official Web site of the European Patent Office, the executive body of the European Patent Organisation.
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| Moscow PatentBureau - Trademarks, patents and other IP related questions in Russia and other ex-USSR countries.
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| National Informatics Center - Patent bibliographic database from the Government of India.
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| Patent Office of the United Kingdom - Intellectual property information in the United Kingdom.
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| ä¸å?Žäººæ°‘共和国国家知识产æ?ƒå±€ - 包括专利申请,审查,ä¿?护,代ç?†å’Œæœ?务ç‰ä¸“利管ç?†ä¿¡æ?¯ã€‚
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| State Office for Invention and Trademarks - Romania - Sole authority over the territory of Romania in ensuring the protection of industrial property.
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| U.S. Patent & Trademark Office - Patent and trademark information in the United States, including free database searching of registered trademarks, registration information, pricing and contact phone numbers.
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| Canadian Trademarks Database - Trade-mark information, which can include designs, wares and services covered by the registration, owner's name and more, from the Canadian Intellectual Property Office.
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| Oficina de Armonización del Mercado Interior -OAMI - Con sede en Alicante, España, tiene por misión registrar las marcas comunitarias y en un futuro próximo los dibujos o modelos comunitarios.
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| Organisation mondiale de la propriété intellectuelle (OMPI) - Publications et législation, fiches techniques sur les inventions, brevets, marques et droits d'auteurs. Structure et politiques.
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| Espacenet - Full text of patents issued by the European Patent Organisation (EPO), France, Germany, Switzerland, United Kingdom, United States, and The World Intellectual Property Organisation (WIPO). The available patent data go back, in some cases, as far as the year 1900.
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