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发明名称
Magnetic dart
摘要
申请公布号
US2665911(A)
申请公布日期
1954.01.12
申请号
US19470752712
申请日期
1947.06.05
申请人
SHORE SIDNEY X
发明人
SHORE SIDNEY X.
分类号
F42B6/00
主分类号
F42B6/00
代理机构
代理人
主权项
地址
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