Variable frequency wave producing means,申请号US19390269092-传众专利搜索

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发明名称	Variable frequency wave producing means
摘要
申请公布号	US2231634(A)	申请公布日期	1941.02.11
申请号	US19390269092	申请日期	1939.04.21
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	MONK NEWTON
分类号	H03B21/02	主分类号	H03B21/02
代理机构		代理人
主权项
地址

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