Audio-frequency band filter with adjustable band width,申请号GB19480032862-传众专利搜索

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发明名称	Audio-frequency band filter with adjustable band width
摘要
申请公布号	GB653301(A)	申请公布日期	1951.05.09
申请号	GB19480032862	申请日期	1948.12.20
申请人	DAPHNE INVESTMENT TRUST	发明人
分类号	H03H7/01	主分类号	H03H7/01
代理机构		代理人
主权项
地址

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