国际专利分类 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "国际专利分类" in Chinese language version.

refsWebsite

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2,636^th place

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epo.org

FAQ on IPC Reform. Hosted by the esp@cenet website, http://www.epo.org/patents/patent-information/ipc-reform/faq.html#16 互联网档案馆的存檔，存档日期2010-10-03.. (Internet Archive version dated October 12, 2007).

Guide to IPC, Version 2012 (PDF). [2024-10-15]. （原始内容存档 (PDF)于2018-08-26）.
FAQ on IPC Reform. Hosted by the esp@cenet website, http://www.epo.org/patents/patent-information/ipc-reform/faq.html#16 互联网档案馆的存檔，存档日期2010-10-03.. (Internet Archive version dated October 12, 2007).
Guide to the International Patent Classification (Eighth Edition), WIPO Publication No 560E.5/8, ISBN 92-805-1442-3, paragraphs 29-33 (Internet Archive version dated October 14, 2007).
国际专利分类（IPC）. 世界知識產權組織. [2024-10-15]. （原始内容存档于2024-04-14）.
List of Old editions of IPC. 世界知識產權組織. [2024-10-15]. （原始内容存档于2025-01-14）.