Supervisory alarm system,申请号US19520304317-传众专利搜索

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发明名称	Supervisory alarm system
摘要
申请公布号	US2655646(A)	申请公布日期	1953.10.13
申请号	US19520304317	申请日期	1952.08.14
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	CALLAHAN VINCENT T.;FRY LLOYD D.
分类号	G08B21/00	主分类号	G08B21/00
代理机构		代理人
主权项
地址

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