共 2 条
- [1] Patent Map Guidance. National Center for Industrial Property Information and Training(NCIPI)-Industrial Property Digital Library(IPDL). http://www5.ipdl.nci-pi.go.jp/pmgs1/pmgs1/pmgs_E .
- [2] Inter-national Patent Classification(IPC)7english version. World Intellectual Property Organization(WIPO). ht-tp://www.wipo.int/classifications/fulltext/new_ipc/ . 2006