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发明名称
Voice current repeater
摘要
申请公布号
US2644044(A)
申请公布日期
1953.06.30
申请号
US19490096052
申请日期
1949.05.28
申请人
AUTOMATIC ELECTRIC LABORATORIES, INC.
发明人
GRANDSTAFF OTHO D.
分类号
H04B1/74
主分类号
H04B1/74
代理机构
代理人
主权项
地址
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