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发明名称
Toy block
摘要
申请公布号
US2278327(A)
申请公布日期
1942.03.31
申请号
US19400354368
申请日期
1940.08.27
申请人
DAVID B. GREENBERG;MEYERHOF
发明人
MAGNUS LUDWIG;MEYERHOF BERTHOLD
分类号
A63H33/10
主分类号
A63H33/10
代理机构
代理人
主权项
地址
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