CIRCUITO ELETTRICO PER IL RISPARMIO DEI CONDUTTORI DA IMPIEGARE COME CIRCUITO DI CHIAMATA PER CITOFANI O COME CIRCUITO DI CONVERSAZIONE O SELEZIONE DEI CITOFANI CON CONVERSAZIONE SEGRETA,申请号IT19770045205-传众专利搜索

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发明名称	CIRCUITO ELETTRICO PER IL RISPARMIO DEI CONDUTTORI DA IMPIEGARE COME CIRCUITO DI CHIAMATA PER CITOFANI O COME CIRCUITO DI CONVERSAZIONE O SELEZIONE DEI CITOFANI CON CONVERSAZIONE SEGRETA
摘要
申请公布号	IT1083324(B)	申请公布日期	1985.05.21
申请号	IT19770045205	申请日期	1977.02.14
申请人	CECCOTTI GRAZIANO	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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