Free Patent Search Sites

1

http://ep.espacenet.com/
2 http://www.uspto.gov/
3 http://www.delphion.com/
4 http://ipdl.wipo.int/
5 http://www1.ipdl.jpo.go.jp/PA1/cgi-bin/PA1INIT?1015432823879
6 http://www.sipo.gov.cn/sipo_English/default.htm
7 http://211.173.78.101/kpa/kpamain.html
8 http://www.epatents.gov.sg/PE/
9 http://patents1.ic.gc.ca/srch_bool-e.html
10 http://www.ipaustralia.gov.au/patents/P_srch.htm
11 http://www.iponz.govt.nz/search/cad/dbssiten.main
12 http://www.jiansuo.com/search.asp
13 http://www2.uil-sipo.si/dse.htm 
14 http://www.iponz.govt.nz/search/cad/dbssiten.main
15 http://pericles.ipaustralia.gov.au/ols/searching/patsearch/search_page.jsp http://
16 http://www.tifac.org.in/ 
 
  http://www.piperpat.co.nz/resource/search.html#pat 


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