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发明名称
Communication system
摘要
申请公布号
US1871310(A)
申请公布日期
1932.08.09
申请号
US19300476966
申请日期
1930.08.22
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
ENTZ FERDINAND S.;BACHELET ALBERT E.
分类号
H04H60/04
主分类号
H04H60/04
代理机构
代理人
主权项
地址
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