Door bells,申请号US19580751774-传众专利搜索

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发明名称	Door bells
摘要
申请公布号	US2912956(A)	申请公布日期	1959.11.17
申请号	US19580751774	申请日期	1958.07.29
申请人	BIERNACKI FELIX F	发明人	BIERNACKI FELIX F.
分类号	G10K1/07	主分类号	G10K1/07
代理机构		代理人
主权项
地址

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