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经营范围
发明名称
Signaling system
摘要
申请公布号
US2320885(A)
申请公布日期
1943.06.01
申请号
US19410384517
申请日期
1941.03.21
申请人
THE STROMBERG-CARLSON TELEPHONE MANUFACTURING COMPANY
发明人
POWELL WINFRED T.
分类号
H04Q5/16
主分类号
H04Q5/16
代理机构
代理人
主权项
地址
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