Professional bodies

• Chartered Institute of Patent Attorneys
• Institute of Trade Mark Attorneys
• Institute of Professional Representatives before the European Patent Office

Law-making bodies and official institutions

• Design Council
• European Patent Office
• The Office of Public Sector Information
• OHIM (The Community Trade Mark Office)
• UK Intellectual Property Office
• WIPO (World Intellectual Property Organization)

General resources

• European Patent Convention
• Ancillary Regulations to the European Patent Convention
• International Classification of Goods and Services for the Purposes of the Registration of Marks under the Nice Agreement (8th edition, WIPO website) 
• International Patent Classification (7th edition, WIPO website)
• Madrid System for the International Registration of Marks
• Paris Convention
• WIPO PCT Database