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经营范围
发明名称
DATA SIGNALLING UNIT FOR TELEPHONE SYSTEMS
摘要
申请公布号
CA1030677(A)
申请公布日期
1978.05.02
申请号
CA19760260829
申请日期
1976.09.09
申请人
DIGI-STAT, LTD.
发明人
FIZER, WILLIAM C.
分类号
H04M11/02;H04M11/06
主分类号
H04M11/02
代理机构
代理人
主权项
地址
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