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About patents About patents	Austrian Patent Office Austrian Patent Office
Basic Search - Canadian Patents Database Canadian Patent Database / Base de données sur les brevets canadiens	Chemical Patent Searching Chemical Patent Searching
Chemical Patents Watch Chemical Patents Watch
Derwent Derwent
esp@cenet esp@cenet
European Patent Office European Patent Office
GetIPDL GetIPDL
IFI Claims patent service IFI Claims patent service	Information on Patents for Researchers Information on Patents for Researchers
Information Specialties Information Specialties	Institut National de la Propriete Industrielle Institut National de la Propriete Industrielle
Instituto Nacional Propriedade Industrial Instituto Nacional Propriedade Industrial	Irish Patents Office Irish Patents Office
P\S\L Consulting Group Inc. P\S\L Consulting Group Inc.	Patent Information Users Group Inc Patent Information Users Group Inc
Patent it Yourself Patent it Yourself	Patentdirektoratet Patentdirektoratet
Patents TM Patents TM	Searching for patents We provide access to the largest single source of technical information in the world, with databases containing millions of patent documents.
STO"s Internet Patent website STO"s Internet Patent website	US Patent Classes - Chemical Group US Patent Classes - Chemical Group
US Patents Office US Patents Office	Who Owns What Intellectual Property, Copyright, and the Next Millenium Who Owns What Intellectual Property, Copyright, and the Next Millenium