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经营范围
发明名称
Control circuits and apparatus for telephone answering and recording devices
摘要
申请公布号
US2883461(A)
申请公布日期
1959.04.21
申请号
US19540442945
申请日期
1954.07.13
申请人
WILSON CAIN HARRY
发明人
CAIN HARRY WILSON
分类号
H04M1/654
主分类号
H04M1/654
代理机构
代理人
主权项
地址
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