武歆
发表于 2021-5-8 17:07:43
https://worldwide.espacenet.com/patent/search/family/022233789/publication/US2010187775A1?q=%20jacobs%20chuckhttps://worldwide.espacenet.com/3.2/rest-services/images/documents/US/2010187775/A1/formats/png/pages/2?EPO-Trace-Id=6rlmos-oeo1hy-XXX-000106
大白小白
发表于 2021-5-9 13:04:04
武歆 发表于 2021-5-8 17:07
https://worldwide.espacenet.com/patent/search/family/022233789/publication/US2010187775A1?q=%20jacob ...
有查询国内专利的网站么，谢谢
武歆
发表于 2021-5-10 08:06:11
大白小白 发表于 2021-5-9 13:04
有查询国内专利的网站么，谢谢
http://cpquery.cnipa.gov.cn/ 专利检索需要注册， http://www.drugfuture.com/cnpat/cn_patent.asp 专利下载，无需注册