Release Time:2024-05-08 Hits:
Date of Publication: 2024-05-08
Journal: 郑州航空工业管理学院学报
Volume: 41
Issue: 01
Page Number: 5-10
Key Words: 知识产权密集型产业; 美国专利商标局; 美国经济
CN: 41-1200/V
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