SOUND INTENSITY CONTROLLING DEVICE,申请号CAD348699-传众专利搜索

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发明名称	SOUND INTENSITY CONTROLLING DEVICE
摘要
申请公布号	CA348699(A)	申请公布日期	1935.03.05
申请号	CAD348699	申请日期
申请人	THE RADIO CORPORATION OF AMERICA	发明人	WILLEM SIX
分类号		主分类号
代理机构		代理人
主权项
地址

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