Patent and trademark information
USPTO Patent Database
Espacenet (Database of the EPO and member countries)
Register Plus (Patent database of the EPO)
German Patent and Trademark Office's database (patents, trademarks and designs)
EU Trademark Database
WIPO Database
USPTO Trademark Database
Patent offices
World Intellectual Property Organization WIPO
National Board of Patents and Registration of Finland (NBPR)
European Patent Office (EPO)
Rospatent, Federal Service for Intellectual Property in Russia
Japan Patent Office (JPO)
Swedish Patent and Registration Office (PRV)
United States Patent and Trademark Office (USPTO)
Office for Harmonization in the Internal Market (OHIM)