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2022-07-03 09:01:00 【luckyyuanyuan】
1、润桐 tps://www.rainpat.com/（用得最多，比较好）
2、http://www.soopat.com/
3、国家知识产权局（可以查专利缴费等业务）
4、http://cpquery.cnipa.gov.cn/
5、http://epub.cnipa.gov.cn/Advanced
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