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发明名称
Acoustic-optical call indicator panel having time delay release of the optical indicators
摘要
申请公布号
US3163857(A)
申请公布日期
1964.12.29
申请号
US19610147022
申请日期
1961.10.23
申请人
GAETANO CONFORZI
发明人
CONFORZI GAETANO
分类号
G08B7/06
主分类号
G08B7/06
代理机构
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