Electrically-operated audible signal device,申请号US19310535833-传众专利搜索

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发明名称	Electrically-operated audible signal device
摘要
申请公布号	US1988700(A)	申请公布日期	1935.01.22
申请号	US19310535833	申请日期	1931.05.08
申请人	WATERBURY CLOCK COMPANY	发明人	PUTNAM JAMES R.
分类号	G10K1/064	主分类号	G10K1/064
代理机构		代理人
主权项
地址

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