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Patents
Patents Assigned to BEIJING DIPPER PUBLISHING CO., LTD
Patents Assigned to BEIJING DIPPER PUBLISHING CO., LTD
Magnetic levitation globe
Patent number:
D885252
Type:
Grant
Filed:
July 31, 2019
Date of Patent:
May 26, 2020
Assignee:
BEIJING DIPPER PUBLISHING CO., LTD
Inventor:
Zhihao Zhang