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发明名称
Expansion shield
摘要
申请公布号
US1795057(A)
申请公布日期
1931.03.03
申请号
US19270162446
申请日期
1927.01.21
申请人
J. EDWARD OGDEN COMPANY
发明人
TOMKINSON CHARLES C.
分类号
F16B13/06
主分类号
F16B13/06
代理机构
代理人
主权项
地址
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