专利检索

国家官网：

http://cpquery.sipo.gov.cn/txnQueryOrdinaryPatents.do?select-key:shenqingh=&select-key:zhuanlimc=%E6%BB%A4%E7%BD%91%E5%A0%B5%E5%A1%9E&select-key:shenqingrxm=&select-key:zhuanlilx=&select-key:shenqingr_from=&select-key:shenqingr_to=&verycode=6&inner-flag:open-type=window&inner-flag:flowno=1508897124278

专利查询

http://www.patexplorer.com/