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发明名称
DUAL FREQUENCY TONE DECODER SYSTEM INTERFACE
摘要
申请公布号
EP0008220(B1)
申请公布日期
1983.06.01
申请号
EP19790301591
申请日期
1979.08.06
申请人
ROLM CORPORATION
发明人
HUGHES, RAYMOND JERALD
分类号
H04Q1/457;(IPC1-7):04Q1/457
主分类号
H04Q1/457
代理机构
代理人
主权项
地址
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