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1. Danish Patent and Trademark Office Org./Gov./Agency Denmark
The Danish Patent and Trademark Office (the DKPTO) is the Danish centre for strategic information and protection of technology and business identifiers.
URL: http://www.dkpto.dk/ in English [Translate]
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2. Delphion Intellectual Property Network Manufacturer United States
The Delphion Intellectual Property Network (IPN) has evolved into a premier Web site for searching, viewing, and analyzing patent documents. The IPN provides you with free access to a wide variety of data collections and patent information.
URL: http://www.delphion.com in English [Translate]
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3. Derwent Service United Kingdom
Patent information, news and feature articles. Information on Derwent' s range of information products for the chemical industry.
URL: http://www.derwent.com in English [Translate]
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4. Dialog Intellectual Property Sources Service United States
This site describes and introduces the collection of databases on Dialog and DataStar that deal with patents and intellectual property. Claims to bring the world' s largest collection of IP materials to your desktop.
URL: http://library.dialog.com/products/1210 in English [Translate]
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