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发明名称
RETAINER FOR TOY CONSTRUCTION BLOCKS
摘要
申请公布号
CA392284(A)
申请公布日期
1940.11.05
申请号
CAD392284
申请日期
申请人
BENJAMIN A. TETZLAFF
发明人
BENJAMIN A. TETZLAFF
分类号
主分类号
代理机构
代理人
主权项
地址
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