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Patent inquiry website
2022-07-03 09:33:00 【luckyyuanyuan】
1、 Runtong tps://www.rainpat.com/（ Most used , better ）
2、http://www.soopat.com/
3、 State Intellectual Property Office （ You can check patent payment and other businesses ）
4、http://cpquery.cnipa.gov.cn/
5、http://epub.cnipa.gov.cn/Advanced
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