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发明名称
Interlocking block
摘要
申请公布号
US2633662(A)
申请公布日期
1953.04.07
申请号
US19500189105
申请日期
1950.10.09
申请人
NELSON WALTER O
发明人
NELSON WALTER O.
分类号
A63H33/06
主分类号
A63H33/06
代理机构
代理人
主权项
地址
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