Variable resistance device,申请号US19500148894-传众专利搜索

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发明名称	Variable resistance device
摘要
申请公布号	US2537671(A)	申请公布日期	1951.01.09
申请号	US19500148894	申请日期	1950.03.10
申请人	JACK	发明人	JACK WILLIAM R.;CAHILL LYSLE D.;BRINKER EMIL M.
分类号	H01C10/00;H01C10/30	主分类号	H01C10/00
代理机构		代理人
主权项
地址

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