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发明名称
YO-YO
摘要
申请公布号
US3452474(A)
申请公布日期
1969.07.01
申请号
USD3452474
申请日期
1966.10.10
申请人
EDWARD N. ZOPF
发明人
EDWARD N. ZOPF
分类号
A63H1/24;A63H1/30;(IPC1-7):A63H1/30;A63H1/00
主分类号
A63H1/24
代理机构
代理人
主权项
地址
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