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发明名称
Communication system
摘要
申请公布号
US1957288(A)
申请公布日期
1934.05.01
申请号
US19300462192
申请日期
1930.06.19
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
PORTMAN CLEMENT A.
分类号
H04B3/54
主分类号
H04B3/54
代理机构
代理人
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地址
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