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经营范围
发明名称
Universal cord circuit
摘要
申请公布号
US2305939(A)
申请公布日期
1942.12.22
申请号
US19400357558
申请日期
1940.09.20
申请人
KELLOGG SWITCHBOARD AND SUPPLY COMPANY
发明人
WALLACE BERT A.
分类号
H04M3/60
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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