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发明名称
INSTALLATION POUR L'APPEL DE PERSONNES AU MOYEN DE SIGNAUX D'APPEL RADIOELECTRIQUES A HAUTE FREQUENCE
摘要
申请公布号
BE773420(A1)
申请公布日期
1972.01.31
申请号
BE19710773420
申请日期
1971.10.01
申请人
CHARBONNAGES DE FRANCE, 9, AVENUE PERCIER, PARIS 8EME (FRANCE),
发明人
分类号
G08B3/10;(IPC1-7):H04B/
主分类号
G08B3/10
代理机构
代理人
主权项
地址
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