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发明名称
Telephone system
摘要
申请公布号
US2028195(A)
申请公布日期
1936.01.21
申请号
US19340735758
申请日期
1934.07.18
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
DIMOND THOMAS L.
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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