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发明名称
BUILDING BLOCK WITH SPACED SLABS
摘要
申请公布号
CA494500(A)
申请公布日期
1953.07.14
申请号
CAD494500
申请日期
申请人
X-T BUILDING BLOCK
发明人
LEON A. HALLSTEAD
分类号
主分类号
代理机构
代理人
主权项
地址
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