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发明名称
Telephone system
摘要
申请公布号
US2336866(A)
申请公布日期
1943.12.14
申请号
US19420456483
申请日期
1942.08.28
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HOVLAND HENRY
分类号
H04M17/02
主分类号
H04M17/02
代理机构
代理人
主权项
地址
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