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发明名称
Communication system
摘要
申请公布号
US2122918(A)
申请公布日期
1938.07.05
申请号
US19350029041
申请日期
1935.06.29
申请人
PHINNEY EDWARD D
发明人
PHINNEY EDWARD D.
分类号
G08C21/00
主分类号
G08C21/00
代理机构
代理人
主权项
地址
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