id: 06026049 dt: a an: 06026049 au: Khattak, Akmal Saeed; Heyer, Gerhard ti: Significance of low frequent terms in patent classification using IPC hierarchy. so: Eichler, Gerald (ed.) et al., 11th international conference on innovative internet community services (I$^{2}$CS 2011). Bonn: Gesellschaft für Informatik e.V. (GI) (ISBN 978-3-88579-280-2). Lect. Notes Inform. 186, 239-250 (2011). py: 2011 pu: Bonn: Gesellschaft für Informatik e.V. (GI) la: EN cc: ut: ci: li: ioport:LNI/Proceedings/Proceedings186/239.pdf ab: Summary: International Patent Classification (IPC) is a standard taxonomy or hierarchy maintained by WIPO (World Intellectual Property Organization). Using this standard hierarchy, patents are classified using machine learning techniques. rv: