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发明名称
Communication system
摘要
申请公布号
US2092442(A)
申请公布日期
1937.09.07
申请号
US19360089411
申请日期
1936.07.07
申请人
CAMERON COLWELL ROBERT
发明人
COLWELL ROBERT CAMERON
分类号
H04J3/04
主分类号
H04J3/04
代理机构
代理人
主权项
地址
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