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发明名称
TONE DETECTION CIRCUIT
摘要
申请公布号
CA914765(A)
申请公布日期
1972.11.14
申请号
CAD914765
申请日期
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
WILLIAM H. SEBASTIAN;MATTHEW P. LANGENDORF
分类号
H03H11/12;(IPC1-7):H03H11/12
主分类号
H03H11/12
代理机构
代理人
主权项
地址
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