Frequency-matching system,申请号US19440543185-传众专利搜索

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发明名称	Frequency-matching system
摘要
申请公布号	US2425028(A)	申请公布日期	1947.08.05
申请号	US19440543185	申请日期	1944.07.01
申请人	ELECTRIC MACHINERY MANUFACTURING COMPANY	发明人	CARTER WILLIAM R.
分类号	H02J3/42;H02P9/42	主分类号	H02J3/42
代理机构		代理人
主权项
地址

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