Patent Search Databases

Free Patent Search Databases:

Espacenet Search Database

UnitedStates Patent Office Search Database

Google Patent Database

WIPO (World Intellectual Property Organisation) Patentscope

Depatisnet(German Patent Office Database)

Patent Abstracts of Japan

Canadian Patent Office Database

Patent Surf

Free Patents Online

Australian Patent Office Search

EPO Register Plus

DPinfo German Patent and Utility Model Register

SumoBrain

CIPIS

Chinese patent database

Espacenet in Russian

SurfIP

ArchPatent

Other Patent Search databases: 

Delphion

Patbase

Questel QPAT

Micropatent

STN International

Minesoft

Orbit.com

IP.com Search database

Enlyton

Patsnap  (Patent search and Analysis)

Posted in: DATABASE,Patent Search