Empirical Study on the Patent Maintenance Information in the Different Technological Fields

Qiao Yongzhong

Library and Information Service ›› 2011, Vol. 55 ›› Issue (06) : 36-39.

PDF(363 KB)
Library and Information Service
PDF(363 KB)
Library and Information Service ›› 2011, Vol. 55 ›› Issue (06) : 36-39.

Empirical Study on the Patent Maintenance Information in the Different Technological Fields

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{{article.zuoZheEn_L}}. {{article.title_en}}[J]. {{journal.qiKanMingCheng_EN}}, 2011, 55(06): 36-39

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