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发明名称
Electric signal
摘要
申请公布号
US2030279(A)
申请公布日期
1936.02.11
申请号
US19340721908
申请日期
1934.04.23
申请人
FRANCISCO TOSCANO
发明人
TOSCANO FRANCISCO
分类号
G10K9/13
主分类号
G10K9/13
代理机构
代理人
主权项
地址
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