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发明名称
DISPOSITIVO RIOE TRASMITTENTE PER COMUNICAZIONI TRA E CON SORDI MITI E DEROLI D UDITO CON L AUSILIO DI NORMALE APPARECCHIO TELEFONICO
摘要
申请公布号
IT1045055(B)
申请公布日期
1980.05.10
申请号
IT19710053602
申请日期
1971.10.21
申请人
FRAOASSI B
发明人
分类号
H04M;(IPC1-7):H04M/
主分类号
H04M
代理机构
代理人
主权项
地址
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