Page end audible signal attachment for typewriters,申请号US19580774706-传众专利搜索

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发明名称	Page end audible signal attachment for typewriters
摘要
申请公布号	US2939566(A)	申请公布日期	1960.06.07
申请号	US19580774706	申请日期	1958.11.18
申请人	BAKER RICHARD A	发明人	BAKER RICHARD A.
分类号		主分类号
代理机构		代理人
主权项
地址

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