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发明名称
TELEPHONE SYSTEM
摘要
申请公布号
CA423187(A)
申请公布日期
1944.10.10
申请号
CAD423187
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
ROBERT CARL MATHES
分类号
主分类号
代理机构
代理人
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地址
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