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经营范围
发明名称
Telephone intercept system
摘要
申请公布号
US2608620(A)
申请公布日期
1952.08.26
申请号
US19470786831
申请日期
1947.11.19
申请人
STROMBERG-CARLSON COMPANY
发明人
KESSLER FRANK
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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