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发明名称
Magnetic movement
摘要
申请公布号
US1955248(A)
申请公布日期
1934.04.17
申请号
US19280270872
申请日期
1928.04.18
申请人
CHARIES MESSICK
发明人
MESSICK CHARIES
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
地址
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