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发明名称
Modulation system
摘要
申请公布号
US1799974(A)
申请公布日期
1931.04.07
申请号
US19260127719
申请日期
1926.08.07
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
CONRAD FRANK
分类号
H03C1/20
主分类号
H03C1/20
代理机构
代理人
主权项
地址
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