UKIPO (UK Intellectual Property Office) www.ipo.gov.uk
EPO (European Patent Office) www.epo.org
epoline Register Plus (European Patent Office Electronic Register) www.epoline.org/portal/public/registerplus
CIPA (The Chartered Institute of Patent Attorneys) www.cipa.org.uk
FICPI (International Federation of Intellectual Property Attorneys) www.ficpi.org.uk
IPI (Institute of Patentees and Inventors) www.invent.org.uk
IPREG (Intellectual Property Regulation Board) www.ipreg.org.uk
UNION-IP (European Practitioners in Intellectual Property) www.union-ip.org
EPI (Institute of Professional Representatives before the European Patent Office) www.patentepi.com
Espacenet (patent database) www.espacenet.com/index.en.htm
Patentscope (search international patent applications) www.wipo.int/pctdb/en/
DEPATISNET (German patent information system) https://depatisnet.dpma.de/DepatisNet/depatisnet?window=1&space=main&content=index&action=index&switchToLang=en
DPMAregister (Register of the German Patent and Trade Mark Office) https://register.dpma.de/DPMAregister/Uebersicht?lang=en
USPTO (United States Patent and Trade Mark Office) http://patents.uspto.gov/
USPTO Public Patent Application Information Retrieval (US Electronic Register) http://portal.uspto.gov/pair/PublicPair
JPO (Japan Patent Office) www.jpo.go.jp/
Japan Industrial Property Digital Library www.ipdl.inpit.go.jp/homepg_e.ipdl
WIPO (World Intellectual Property Organization) http://www.wipo.int/portal/index.html.en
ITMA (Institute of Trade Mark Attorneys) http://www.itma.org.uk/
EUIPO European Union Intellectual Property Office www.euipo.europa.eu
INTA (International Trade Mark Association) www.inta.org
Design Council www.designcouncil.org.uk
OPSI (Office of Public Sector Information), now The Official Home of UK Legislation www.legislation.gov.uk