ELECTRIC FREQUENCY METERS,申请号CAD547498-传众专利搜索

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发明名称	ELECTRIC FREQUENCY METERS
摘要
申请公布号	CA547498(A)	申请公布日期	1957.10.15
申请号	CAD547498	申请日期
申请人	CANADIAN MARCONI COMPANY	发明人	HAROLD JEFFERSON;PHILIP E. JELLYMAN
分类号		主分类号
代理机构		代理人
主权项
地址

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