Time indicating device,申请号US19300468440-传众专利搜索

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发明名称	Time indicating device
摘要
申请公布号	US1935842(A)	申请公布日期	1933.11.21
申请号	US19300468440	申请日期	1930.07.16
申请人	FREEL ALBERT E	发明人	FREEL ALBERT E.
分类号	G04B19/20;G04B19/23	主分类号	G04B19/20
代理机构		代理人
主权项
地址

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