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经营范围
发明名称
Electrical network
摘要
申请公布号
US2250461(A)
申请公布日期
1941.07.29
申请号
US19380210795
申请日期
1938.05.28
申请人
SUBMARINE SIGNAL COMPANY
发明人
BATCHELDER LAURENCE
分类号
H03H7/32
主分类号
H03H7/32
代理机构
代理人
主权项
地址
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