해외 지적 재산권에 관한 링크모음
These are links to English language public search systems
at various patent authorities all over the world:
US Patent & Trademark Office 
  Home Page: http://www.uspto.gov/ 
  Patent Search:  http://www.uspto.gov/patft/index.html 
European Patent Office** 
  Home Page: http://www.european-patent-office.org/index.en.php 
  Portal - espacenet: http://www.espacenet.com/ 
  Numeric, Quick and Advanced searches: http://ep.espacenet.com/ 
Canadian Patent Office 
  Home page and Intro: http://patents1.ic.gc.ca/intro-e.html 
  Number Search: http://patents1.ic.gc.ca/srch_num-e.html 
  Advanced Search: http://patents1.ic.gc.ca/srch_adv-e.html 
German Patent Office **  
  Patent Search:  http://depatisnet.dpma.de/DepatisNet/... 
Japan Patent Office 
  Advanced Search: http://www.deux.jpo.go.jp/cgi/search.cgi?lang=en 
  Industrial Property Digital Library: http://www.ipdl.ncipi.go.jp/homepg_e.ipdl 
Korean Patent Office ++  
  Patent Search: http://eng.kipris.or.kr/ 
Australian Patent Office  
  Quick Patent Search : http://apa.hpa.com.au:8080/ipapa/qsearch 
  Advanced Search : http://apa.hpa.com.au:8080/ipapa/asearch 
Indian Patent Office ** 
  Home Page/Patent Search: http://patinfo.nic.in/ 
 (search link in center of page) 
NOTES: 
1) Even though some of the patent authorities (above) have slightly different names (not actually called a "Patent office," per say) we call them that for simplicity of page layout and ease of use (on this page, only).  
2) One asterisk (*)  means that documents from at least one other patent authority may be found at the web site. 
3) Two asterisks (**) mean that patents or documents from several countries may be found at the site.  
4) Two plus signs (++) means that Free registration is required in order to search. 
5) The links should take you to the English versions of the web sites. If not, or you find a link that has become stale, please drop us a "quick" note to Support(at)IPDataCorp.com - Thanks!