Polyphase vacuum-tube oscillator,申请号US19270203713-传众专利搜索

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发明名称	Polyphase vacuum-tube oscillator
摘要
申请公布号	US1788720(A)	申请公布日期	1931.01.13
申请号	US19270203713	申请日期	1927.07.06
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	JENSEN AXEL G.
分类号	H03H7/21;H03H11/18	主分类号	H03H7/21
代理机构		代理人
主权项
地址

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