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)

·        US Patent Classes - by Title - PATENTEC