Research on Patent Quality of International Oil Companies in China

WU Dan, FAN Xianghong, NIU Liquan, ZHANG Qi, HAO Lijuan

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中国科技核心期刊（中国科技论文统计源期刊）
ISSN 2095-8870　CN 31-2107/G3
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Competitive Intelligence ›› 2022, Vol. 18 ›› Issue (2) : 25-33.

Research on Patent Quality of International Oil Companies in China

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