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发明名称
TONE INHIBITOR CIRCUIT FOR PLURAL TONE RECEIVER
摘要
申请公布号
US3447133(A)
申请公布日期
1969.05.27
申请号
USD3447133
申请日期
1966.03.07
申请人
MOTOROLA INC.
发明人
WILLIAM J. COLE;FRED J. CONFORTI
分类号
G08B3/10;H04W88/02;(IPC1-7):H04Q3/00
主分类号
G08B3/10
代理机构
代理人
主权项
地址
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