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经营范围
发明名称
RING TRIP DETECTION CIRCUIT
摘要
申请公布号
JPH0327653(A)
申请公布日期
1991.02.06
申请号
JP19890162172
申请日期
1989.06.23
申请人
FUJITSU LTD
发明人
ASANO HIROYUKI;NAGATO TAKASHI;MIYAGAWA TAKESHI
分类号
H04M3/02
主分类号
H04M3/02
代理机构
代理人
主权项
地址
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