Derwent Innovations Index
Provides access to more than 14,800,000 patents with links to cited and citing patents, cited articles, and full-text patent data sources. Access for students and employees at Aarhus University

Free patent information on the internet

USPTO Patents Database 
Web site for searching, viewing, and analyzing patent documents. Free access to a wide variety of data collections and patent information

Information (and links) on patents 
(information on Europen and US patents)

Information (and links) on standards 
(information on Danish Standards, ISO, ASTM)