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发明名称
Contact chatter indicator
摘要
申请公布号
US2244338(A)
申请公布日期
1941.06.03
申请号
US19400354780
申请日期
1940.08.30
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
KREBS LUTHER E.
分类号
H04Q1/20
主分类号
H04Q1/20
代理机构
代理人
主权项
地址
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