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Current US trademark and patent information and searches are available at the US Patent and Trademark Office website

Patent information: http://www.uspto.gov/main/patents.htm
Patent search: http://www.uspto.gov/patft/index.html
File a patent: http://www.uspto.gov/ebc/efs/index.html  (fee schedule)

Trademark information: http://www.uspto.gov/main/trademarks.htm
Trademark search: http://tess2.uspto.gov/bin/gate.exe?f=login&p_lang=english&p_d=trmk
File a trademark: http://www.uspto.gov/teas/index.html ($325 filing fee)

Google Patent Search: http://www.google.com/patents

Quote:Google has released a beta version of its new Patent Search tool that lets users search the full text of the U.S. patent corpus to locate patents of interest. An "Advanced Patent Search" page allows users to drill down to specific criteria, including patent number, inventor and filing date. Google Patent Search uses much of the same technology that powers Google Book Search...

oogle's goal with Patent Search is apparently to make U.S. Patent and Trademark Office (USPTO) and related information published by the government for public consumption more usable to the lay searcher...

full article: http://ecommercetimes.com/story/DTXvm7Zt...Beta.xhtml