http://www.wipo.int

WIPO allows searching and browsing of the PCT Gazette, JOPAL, and Filed WIPO Specification materials facilities. They provide searching facilities in a similar format to the USPTO style. Recently they have made the PCT filewrapper available online with full text searching ability.

PCT Online File Inspection System - Simple Search
PCT Online File Inspection System - Structured Search
PCT Online File Inspection System - Advanced Search
PCT Gazette - Simple Search
PCT Gazette - Structured Search
PCT Gazette - Advanced Search
PCT Electronic Gazette
PCT Electronic Gazette - Weekly Issues
JOPAL Database - Simple Search
JOPAL Database - Structured Search
JOPAL Database - Advanced Search
Intellectual Property Digital Library (IPDL)
PatentScope - Patent and Technical Information
WIPO INID Codes
WIPO Gold Entry Portal

Hague Express (Designs) - Simple Search
Hague Express (Designs) - Structured Search
International Designs Bulletin

WIPO provides an online reference to the International Patent Classification System (IPC).

WIPO International Patent Classification (IPC) 2012.01
WIPO International Patent Classification (IPC) Tacsy Search 2010.01
WIPO International Patent Classification (IPC) IPCcat Search 2009.01

WIPO International Patent Classification (IPC 8) 2010.01

IPC 7 | Guide | Catch | Search | A | B | C | D | E | F | G | H

IPC 6 | Guide | Catch | Search | A | B | C | D | E | F | G | H