Guide to the International Patent Classification (2011)

作者: WIPO

出版年份: 2011

.

https://www3.wipo.int/contact/zh/ https://www.wipo.int/pressroom/zh/ https://www.wipo.int/tools/zh/disclaim.html https://www.wipo.int/tools/zh/privacy_policy.html https://www.wipo.int/accessibility/zh/ https://www.wipo.int/tools/zh/sitemap.html https://www3.wipo.int/newsletters/zh/ https://www.wipo.int/podcasts/zh/ https://www.wipo.int/news/zh/