linky PI

https://register.epo.org/espacenet/application?number=EP09805899

http://ep.espacenet.com/advancedSearch?locale=en_EP

http://www.wipo.int/standards/en/pdf/03-­‐09-­‐01.pdf

http://www.delphion.com/help/kindcodes

http://depatisnet.dpma.de/DepatisNet/depatisnet?window=1&space=main&content=index&action= index

Patent mapping http://www.toryod.com/pdf/patent_map_JPO.pdf http://www.icsti.org/IMG/pdf/VTTDataMiningTools.pdf