Selector system for amplifiers,申请号US19370155777-传众专利搜索

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发明名称	Selector system for amplifiers
摘要
申请公布号	US2286170(A)	申请公布日期	1942.06.09
申请号	US19370155777	申请日期	1937.07.26
申请人	HEILAND RESEARCH CORPORATION	发明人	HELLAND CARL A.
分类号	G01V1/24;G01V3/36	主分类号	G01V1/24
代理机构		代理人
主权项
地址

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