中国农业专利的质量:基于不同申请时期、申请主体和技术领域的比较
刘丽军, 宋敏
Patent Quality in China’s Agricultural Sector: A Comparison Across Different Filing Periods, Applicants and Technology Fields
LIU Li-Jun, SONG Min
中国农业科学
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2012, (17): 3617
-3623
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DOI: 10.3864/j.issn.0578-1752.2012.17.019