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发明名称
Telephone system
摘要
申请公布号
US2211116(A)
申请公布日期
1940.08.13
申请号
US19370130388
申请日期
1937.03.11
申请人
SIEMENS BROTHERS & COMPANY LIMITED
发明人
HENSLER BERNARD ANTHONY
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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