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发明名称
TELEPHONE SYSTEM USING SINGLE-MOTION NUMERICAL SWITCHES
摘要
申请公布号
CA574804(A)
申请公布日期
1959.04.28
申请号
CAD574804
申请日期
申请人
NORTHERN ELECTRIC COMPANY
发明人
FREDERICK L. KAHN
分类号
主分类号
代理机构
代理人
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