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发明名称
Warning magnetic unit
摘要
申请公布号
US2462715(A)
申请公布日期
1949.02.22
申请号
US19440554385
申请日期
1944.09.16
申请人
BOOTH JAMES C
发明人
BOOTH JAMES C.
分类号
H01F7/02
主分类号
H01F7/02
代理机构
代理人
主权项
地址
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