Here is a cool Web site for US Patent searching ...

http://www.freepatentsonline.com/

It is a useful site for US patent searching, which includes:

US Patents
US Patent Applications
EP documents
Abstracts of Japan
WIPO (PCT)
Non-patent Literature

The  site also includes cool \&quotatent Maps\" for \"Geographical Visualization\"

http://www.freepatentsonline.com/maps

Unfortunately, it seems very few US patents are applied from China, much lower than those from India

BTW, if someone out there know other useful sites, welcome to post them here !

OMG！

thank U.

thanks

Thank u for sharing

You're very generous. tku

You're very generous. tku