FREE SEARCHES:

• Espacenet    (Espacenet Detailed Search)

• DEPATIS

• USPTO

REGISTER:

• Swiss Registry of Protective Rights On-line

• Online European Patent Register

• Register of German Patent and Trademark Office

• Patent Status Information Service UK

PATENT OFFICES:

• IGE Swiss Federal Institute of Intellectual Property

• EPO European Patent Office

• WIPO World Intellectual Property Organization

• USPTO United States Patent and Trademark Office

• DPMA German Patent and Trademark Office

PATENT CLASSIFICATION SYSTEMS

• IPC (International Patent Classification) English

• IPC (Internationale Patentklassifikation) Deutsch

• US Patent Classification - USPTO

• US Patent Classes - by Title - PATENTEC

Updated, 12.11.2006, Webmaster