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发明名称
Reproducing device
摘要
申请公布号
US1760085(A)
申请公布日期
1930.05.27
申请号
US19280304475
申请日期
1928.09.07
申请人
PLUM JR WILLIAM T
发明人
JR. WILLIAM T. PLUM,
分类号
H04R1/24
主分类号
H04R1/24
代理机构
代理人
主权项
地址
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