Patent Databases
Databases of a number of countries, for free of charge:
DEPATISnet (German Patent and Trademark Office)
Espacenet (EPO)
EAPATIS (EAPO)
Federated Register Service (EPO)
Freepatentsonline
Google patents (Google)
HU - FEDERATED REGISTER SERVICE
IPdiscover
Latipat - Espacenet (Latin American patent database)
National Informatics Centre - EPIDOS-INPADOC (India)
Patentscope (WIPO)
Patentlens
Priorsmart
SurfIP
Databases of a number of countries, subject to fee
Delphion
DialogSelect
Global Patent Index (EPO)
Ificlaims
Micropatent
Patbase
Patbase express
Patentorder Patenttracker
Patolis-e (Japan)
Paton (Ilmenau Technical University)
Qpat (Questel-Orbit)
Software patent
STNeasy
National databases for free of charge
Armenia
Belarus (patent database)
Belarus (utility model database)
Canada
China
Croatia
Cuba
Czech Republic
Denmark
Egypt
Estonia
Finland
France
Germany
Greece
Guangdong, Hong Kong ,Macau
India
Indonesia
Ireland
Israel
Italy
Japan (PAJ)
Korea, South
Lithuania
Malaysia
Moldova
Morocco
Mexico
Mozambique
Netherlands
New Zealand
Norway
Philippines
Poland
Romania
Serbia
Singapore
Slovakia
Slovenia
Spain
Sweden
Switzerland
Syria
Taiwan
Thailand
Tunisia
Turkey
United Kingdom
United States of America
Ukraine
Viet Nam
Plant variety databases
Community Plant Variety Office
New Zealand
United States of America
UPOV
Patent gazettes
Argentina
Armenia
Australia
Austria
Bosnia-and Herzegovina
Bulgaria
Croatia
Czech Republic
Estonia
Finland
France
Hong Kong
Iceland
Ireland
Japan
Lithuania
Macedonia
Malaysia
Malta
Mexico
Moldova
Montenegro
New Zealand
Norway
Pakistan
Philippines
Poland
Portugal
Romania
Russia
Serbia
Slovakia
Slovenia
Spain
Sweden
United Kingdom
United States of America
Venezuela
Viet Nam