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发明名称
Automatic telephone system
摘要
申请公布号
US2102953(A)
申请公布日期
1937.12.21
申请号
US19350051251
申请日期
1935.11.23
申请人
MIX & GENEST AKTIENGESELLSCHAFT
发明人
HEYDUCK ALFRED
分类号
H04Q3/62
主分类号
H04Q3/62
代理机构
代理人
主权项
地址
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