Patent offices of the member states

• China Patent
• Austrian Patent Office
• Belgian Patent Office (Ministry of Economic Affairs)
• Bureau voor de Industriële Eigendom (The Netherlands)
• Danish Patent Office
• Direction de l'Expansion Économique - Division de la Propriété Intellectuelle (Monaco)
• German Patent Office / Deutsches Patent- und Markenamt
• Oficina Española de Patentes y Marcas
  
• Greek Industrial Property Organisation
• Institut National de la Propriété Industrielle (France)
• Italian Patent and Trademark Office
• National Board of Patents and Registration of Finland
• Portuguese Patent Office
• Service de la Propriété Intellectuelle (Luxembourg)
• Swedish Patent and Registration Office
• Swiss Federal Institut of Intellectual Property
• United Kingdom Patent Office

Other national Offices or similar authorities

• Australian Patent Office
• Brazilian Institute of Industrial Property
• Canadian Intellectual Property Office
• The Patent Office of the People's Republic of China
• Croatian Patent Office
• Czech Industrial Property Office
• Intellectual Property (IP) Department Hong Kong Government
• Hungarian Patent Office
• Georgian Patent Office
• Directorat Patent Indonesia
• Industrial Property Office of the Slovak Republic
• Japanese Patent Office
• Korean Patent Office
• Malaysian Intellectual Property division
• (Moldova) State Agency on Industrial Property Protection of the Republic of Moldova
• Peruvian Intellectual Property Office
• Polish Patent Office
• Registery of Trade Marks and Patents, Singapore
• Romanian State Office for Inventions and Trademarks
• Slovenian Intellectual Property Office
• New Zealand Patent Office
• The State Patent Bureau of the Republic of Lithuania
• United States Patent and Trademark Office
• World Intellectual Property Organization

Legal texts and patent classification systems

• The 6th edition of the IPC (International Patent Classification)
• US patent classification
• The EPC (European Patent Convention)
• US Patent Act

Patent databases

• esp@cenet
• AIDS Patents
• Biotechnology and US patents
• bunsan-service
• Canadian Patent Bibliographic Database
• Centro de Innovación e Transferencia de Tecnoloxía (Santiago de Compostella)
• European Coating Patents Database
• Data Star
• Dirección de Innovación (Argentina)
• The Dialog Corporation
• Fachinformationszentrum Karlsruhe (STN)
• French jurisprudence database
• FILDATA
• IBM Patent Server
• IFI/Plenum Data Corp
• Internet Multicasting Service
• Jiangxi information institute of science and technology, Nanchang ,CHINA
• Japan Patent Information Organization (JAPIO)
• The Dialog Corporation
• Lexis-Nexis
• PatCite
• PCT-Gazette
• Questel.Orbit
• Q-PAT (QUESTEL.ORBIT)
• Patent & Know-how Information Division
• patolis-web
• Shadow Patent Office
• Tropical databases
• UBC Library Canadian Patent Index PATSCAN
• Univentio
• University "St Cyril and Methodius"
• US Patent Bibliographic Data
• U.S. Patent Citation Database

Patent information providers

• Bibliothèque de l'Université Laval
• Bieberich's Patent Copy and Search Service
• Chemical Patents Plus (CAS)
• CHI Research
• Centre Henri Tudor
• Derwent
• European Caveats Limited
• Great Lakes Patent & Trademark Center - Patent Library
• IFI/Plenum Data Corp
• INFOCO-System
• Institut National de la Propriété Industrielle
• Internet Patents
• Japan Patent Information Organization
• Japanese Patent Information ISTA
• Manning & Napier Information Services
• MicroPatent
• Mogee Research & Analysis Associates
• N2K Telebase's Brainwave
• Nomen!
• Guenther Kehl
• Prous Science
• Patents Information Services-The British Library
• Reedfax
• RWS Information Ltd & RWS Translations Ltd
• SCI³
• Shadow Patent Office
• SmartPatents
• STO's Internet Patent Search System
• Strategic Patent Resources on the Web
• Transpatent GmbH
• Univentio
• Wila Verlag und Bertelsmann InformationsService (German and English)
• Wila Verlag Wilhelm Lampl GmbH (German and English)
• World Intellectual Property Report
• WPT

Mailing lists and Newsgroups

• EPO mailing list
• "Brevetti", a mailing list in Italian
  
• Information page on newsgroups and mailing lists
• Newsgroup about intellectual property
• Newsgroup alt.inventors
• PIUG/PATMG Patent Information Discussion Listserv

Patent software

• MapOut/MapOut Pro - Information & Order

Useful European connections

• CORDIS, The Community R & D Information Service
• EUREKA
• EUROPA EUROPA is a common endeavour of the EU's institutions, run by the European Commission
• Europole
• I*M Europe
• IPR Helpdesk Intellectual Property Rights
• OHIM (European Trademark Office)
  
• UK Network of Euro Info Centres (EICs)

Miscellaneous

• acumass
• AD-EX TRANSLATIONS
• AWIN NETWORK Legal Services Center
• Biotech Law Web Server
• BTG - management of intellectual property rights
• Browse the International Patent Classification system unofficial version of the IPC
• Copyright Brem & Borer
• Danish Tecnological Institute
• Deutsche Patentanwaltskammer
• Dagostini
• Edinburgh Engineering Virtual Library (EEVL)
• Engineering Information Inc.
• ENGINEERING ELECTRONIC LIBRARY (EELS)
• French jurisprudence database
• Faculdade de Engenharia da Universidade do Porto
• GLOBAL IP ESTIMATOR
• Gowling, Strathy & Henderson
• Intellectual Property Information from Japan
• Japanese Language Services Ltd
• National Computer Board, Singapore
• Patentassessor (DE)
• Patent Awards
• PatentPro
• RWS Translations Ltd
• SBH - Footwear Marketing Group
• Search the US Patents Classification System
• Swedish Inventors' Association
• SGA² management of annuities
• Technical Translations Agency
• The VRN Patent Info Service
• US Patent Act
• U.S. Patent FAQ by Da Vinci Design Resource
• Young Inventors Network

Directories of patents attorneys

• CNCPI The list of the French Industrial Property Attorneys
• Deutsche Patentanwaltskammer: German Patent attorneys database
• Institute of Professional Representatives before the EPO
• Database of Professional Representatives before the EPO
• Italian Patent Attorneys database
• Patent Attorneys and Agents Registered to Practice before the PTO
• Worldwide Listing of Patent Attorneys
• The Chartered Institute of Patent Agents UK
• Directory of Intellectual Property Law Firms
• Verzeichnis der Kanzleisitze

Other lists of ressources on the web

• University of ALICANTE-MASTER on Intellectual Property
• Patents on the Internet
• the Patent Portal
• Strategic Patent Resources on the Net