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经营范围
发明名称
A TELEPHONE INTERFACE CIRCUIT
摘要
A circuit comprising a handset off-hook detector, a ring detector and a line unlooped detector with a combined impedance up to the mega-ohm range, designed for parallel connection to a common telephone line with its high impedance.
申请公布号
WO9602103(A1)
申请公布日期
1996.01.25
申请号
WO1995SG00010
申请日期
1995.06.21
申请人
LAU, EE, THEOW
发明人
LAU, EE, THEOW
分类号
H04M1/738;H04M1/82;(IPC1-7):H04M1/00
主分类号
H04M1/738
代理机构
代理人
主权项
地址
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