Improvements in apparatus for recording periods of electric current flow,申请号GB19530012957-传众专利搜索

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发明名称	Improvements in apparatus for recording periods of electric current flow
摘要
申请公布号	GB736167(A)	申请公布日期	1955.09.07
申请号	GB19530012957	申请日期	1953.05.08
申请人	JOHN CONRAD ARNOLD	发明人
分类号	G07C1/08	主分类号	G07C1/08
代理机构		代理人
主权项
地址

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