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发明名称
VOICE OPERATED TELEPHONE TRANSMISSION CIRCUIT
摘要
申请公布号
CA321305(A)
申请公布日期
1932.04.05
申请号
CAD321305
申请日期
申请人
THE WESTERN ELECTRIC COMPANY
发明人
CHARLES N. NEBEL
分类号
主分类号
代理机构
代理人
主权项
地址
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