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发明名称
Trouble indicating system
摘要
申请公布号
US2364796(A)
申请公布日期
1944.12.12
申请号
US19420436457
申请日期
1942.03.27
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KORN FRANKLIN A.
分类号
H04M3/08
主分类号
H04M3/08
代理机构
代理人
主权项
地址
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