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发明名称
Electronic busy test circuit
摘要
申请公布号
US2866004(A)
申请公布日期
1958.12.23
申请号
US19540414166
申请日期
1954.03.04
申请人
GENERAL TELEPHONE LABORATORIES, INCORPORATED
发明人
MOLNAR IMRE
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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