Links to International Patent Searches
Espacenet offers free access to information about inventions and technical developments from the 19th century right up to today.
Using Patentscope you can search 72 million patent documents including published international patent applications (PCT)
The European Patent Register is the most complete and up-to-date source of publicly available procedural information on European patent applications as they pass through each stage of the granting process. This free online service contains procedural information on all European patent applications from the moment they are published. It includes links to the patent registers of many of the EPO member states, showing the status of European patents after grant, when the national patent offices take over responsibility for them.
The Federated Register provides a single point of access to reliable post‑grant bibliographic and legal status information on European patents. It is available free of charge.