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经营范围
发明名称
TELEPHONE SYSTEM
摘要
申请公布号
CA368219(A)
申请公布日期
1937.08.24
申请号
CAD368219
申请日期
申请人
THE WESTERN ELECTRIC COMPANY
发明人
LEE R. WALLER
分类号
主分类号
代理机构
代理人
主权项
地址
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