国内专利查询网站
- patenthub专利检索 速度最快，目前只有国内专利, 有免费pdf下载
- soopat 老牌网站，各种广告, 高级功能收费
- 佰腾 数据不全
- 知识产权局专利检索及分析 比较慢
Created
January 23, 2017 07:21
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国内专利查询网站
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