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发明名称
TELEPHONE SYSTEM
摘要
申请公布号
CA355533(A)
申请公布日期
1936.01.21
申请号
CAD355533
申请日期
申请人
THE WESTERN ELECTRIC COMPANY
发明人
CHARLES DEWEY KOECHLING
分类号
主分类号
代理机构
代理人
主权项
地址
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