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发明名称
RINGING CONTROL CIRCUIT
摘要
申请公布号
CA500983(A)
申请公布日期
1954.03.23
申请号
CAD500983
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
MYRON C. GODDARD
分类号
主分类号
代理机构
代理人
主权项
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