Improvements in volume control circuit arrangements,申请号GB19390030525-传众专利搜索

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发明名称	Improvements in volume control circuit arrangements
摘要
申请公布号	GB536035(A)	申请公布日期	1941.04.30
申请号	GB19390030525	申请日期	1939.11.21
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY LIMITED;ERICH ERNST ZEPLER	发明人
分类号	H03G1/04;H03G3/22	主分类号	H03G1/04
代理机构		代理人
主权项
地址

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