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发明名称
Telephone or like system
摘要
申请公布号
US2375622(A)
申请公布日期
1945.05.08
申请号
US19430486784
申请日期
1943.05.13
申请人
SIEMENS BROTHERS & CO. LIMITED
发明人
CHRISTIAN DAVID ADAM;LONG DOUGLAS PERCY
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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