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) 8
WIPO International Patent Classification (IPC) 8 - Tacsy Search
WIPO International Patent Classification (IPC) 8 - IPCcat Search

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