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发明名称
SISTEMA E GENERATORE DEL TONO DI CHIAMATA ULTRACOMPATTO, STABILIZZATO PER UN'AMPIA VARIAZIONE DELLA TENSIONE CONTINUA DI INGRESSO IMPIEGABILE NEGLI APPARATI DI TELECOMUNICAZIONE
摘要
申请公布号
IT8922592(D0)
申请公布日期
1989.12.04
申请号
IT19890022592
申请日期
1989.12.04
申请人
TELETTRA - TELEFONIA ELETTRONICA E RADIO
发明人
ECCHER CARLO;MILANI MARCO
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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