Secondary timekeeping apparatus,申请号US19460661123-传众专利搜索

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发明名称	Secondary timekeeping apparatus
摘要
申请公布号	US2510583(A)	申请公布日期	1950.06.06
申请号	US19460661123	申请日期	1946.04.10
申请人	INTERNATIONAL BUSINESS MACHINES CORPORATION	发明人	JOHNSON REYNOLD B.;GEIGER EDWARD F.
分类号	G04C13/10	主分类号	G04C13/10
代理机构		代理人
主权项
地址

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