ELECTRONIC DOOR ANNOUNCER,申请号US19750616643-传众专利搜索

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发明名称	ELECTRONIC DOOR ANNOUNCER
摘要
申请公布号	US4075659(A)	申请公布日期	1978.02.21
申请号	US19750616643	申请日期	1975.09.25
申请人	DESANTI, ETIENNETTE ROMANI	发明人	DESANTI, ETIENNETTE ROMANI
分类号	E05B47/04;G08B27/00;H04M11/02;H04N7/10;H04N7/18;(IPC1-7):H04N7/18	主分类号	E05B47/04
代理机构		代理人
主权项
地址

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