Patent Download Websites

Download Websites

http://patentscope.wipo.int/search/en/search.jsf

http://patentscope.wipo.int/search/zh/search.jsf

http://patft.uspto.gov/
(US Patent and Trademark Office ， USPTO)

http://www.pat2pdf.org/

http://worldwide.espacenet.com/ 

http://www.drugfuture.com/cnpat/cn_patent.asp
(Free Chinese Patent Search and download)

http://www.drugfuture.com/uspat/us_patent.asp

http://search.sipo.gov.cn/sipo/zljs/searchflzt.jsp
 (chinese patent search provided by state intellectual property office of china)

http://www.soopat.com/
SooPAT

http://so.5ipatent.com/

http://www.chemyq.com/patent.htm
(read online for free full length of Chinese patents published since september, 1985)

http://www.epatents.gov.sg/PE/

http://www.ultra-patent.jp/Search/Search+.aspx

http://www.jpo.go.jp
 (Free Japanese Patent Search)

http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/introduction.html

http://eng.kipris.or.kr/eng/main/main_eng.jsp
（Korean patent search)

http://www.freepatentsonline.com/search.html
freepatentsonline

http://www.patentlens.net/patentlens/quick.html?noScroll

http://pay.patentfetcher.com/Patent-Fetcher-Form.php

http://www.patentics.com/indexcn.htm

http://www.google.com/patents
(free google patent search and download)

http://zhuanli.baidu.com/

http://pat365.com/search.jsp 
(Search patents from Taiwan)

http://www.patentstorm.us/

http://www.zhihuiya.com/