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发明名称
Dispositif établissant une liaison silencieuse entre le consommateur et le serveur d'un établissement public ou privé, tel que café, restaurant, bar, club, etc.
摘要
申请公布号
FR1072246(A)
申请公布日期
1954.09.09
申请号
FRD1072246
申请日期
1953.03.06
申请人
发明人
LOUIS
分类号
G08B5/36
主分类号
G08B5/36
代理机构
代理人
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地址
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