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发明名称
Telephone answering service system
摘要
申请公布号
US2985721(A)
申请公布日期
1961.05.23
申请号
US19580731399
申请日期
1958.04.28
申请人
GENERAL DYNAMICS CORPORATION
发明人
GATZERT ERNEST H.
分类号
H04M3/54;H04Q3/00
主分类号
H04M3/54
代理机构
代理人
主权项
地址
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