National usergroups

BE Belgium BEPIUG Belgian Patent Information User Group
CH Switserland CHPIUG Swiss Patent Information User Group
DK Denmark PIF Patent information Forum
FR France CFIB Club Francophone d'Information Brevet
GB Great Brittain PATMG Patent and Trademark Group
IT Italy AIDB Associazione Italiana Documentalisti Brevettuali

International usergroups

CEPIUG Confederacy of European Patent Information User Groups Cooperation platform of European national usergroups
PDG Patent Documentation Group Association for patent information professionals of Europe's major industry
PIUG Patent Information User Group Originally an association of US patent information professionals, but includes members from all over the world