Measurement and Spatio-temporal Evolution of Patent Quality in China at the City Level

DING Huanfeng, HE Xiaofang, SUN Xiaozhe

Economic geograph ›› 2021, Vol. 41 ›› Issue (5) : 113-121.

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Economic geograph ›› 2021, Vol. 41 ›› Issue (5) : 113-121. DOI: 10.15957/j.cnki.jjdl.2021.05.013

Measurement and Spatio-temporal Evolution of Patent Quality in China at the City Level

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{{article.zuoZheEn_L}}. {{article.title_en}}[J]. {{journal.qiKanMingCheng_EN}}, 2021, 41(5): 113-121 https://doi.org/10.15957/j.cnki.jjdl.2021.05.013

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