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Search Patents

*   Google Patent Search
Read and download millions of patents and patent applications using Google Patent Search

*   USPTO Patent Full-Text and Image Database
The US Patent and Trademark Office (PTO) offers World-Wide Web (Web) access to bibliographic and full-text patent databases.

*   WIPO International Patent Applications
This facility allows you to search international patent applications and to view the latest information and documents

*   FreePatentsOnlinePatent Searching and Inventing Resources
The  search engine is one of the most powerful, fastest and easiest patent search engines on the web

*   European Patent Search
A comprehensive data base for patents

*   Korean Intellectual property Search
KIPRIS is an internet-based patent document search service which is available to the public free of charge

*   Japan Patent office
Japan patent office site and information on patents

*   Patent data Resources Patent data resources at the EBI contains patent abstracts, patent chemical compounds, patent sequences and patent equivalents. There are various ways of accessing and searching the patent data