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经营范围
发明名称
Conduit system for structures having masonry walls and door frames
摘要
申请公布号
US3303616(A)
申请公布日期
1967.02.14
申请号
US19630296333
申请日期
1963.07.19
申请人
BROWN ARTHUR T
发明人
BROWN ARTHUR T.
分类号
E04B1/00
主分类号
E04B1/00
代理机构
代理人
主权项
地址
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