livezhang wrote: http://ep.espacenet.com/help?topic=detailedcoverage&locale=EN_ep&method=handleHelpTopic http://ep.espacenet.com/help?topic=detailedcoverageab&locale=EN_ep&method=handleHelpTopic http://ep.espacenet.com/help?topic=bibliocoverage&locale=EN_ep&method=handleHelpTopic http://ep.espacenet.com/help?topic=coverageww&locale=EN_ep&method=handleHelpTopic 楼主看看这几个页面就清楚了!
wxl wrote: 权威地址:http://documents.epo.org/projects/babylon/eponet.nsf/0/2464E1CD907399E0C12572D50031B5DD/$File/global_patent_data_coverage.pdf
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