ELECTRO-MECHANICAL TRANSDUCER DEVICE,申请号CAD461588-传众专利搜索

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发明名称	ELECTRO-MECHANICAL TRANSDUCER DEVICE
摘要
申请公布号	CA461588(A)	申请公布日期	1949.12.06
申请号	CAD461588	申请日期
申请人	THE BRUSH DEVELOPMENT COMPANY	发明人	CHARLES K. GRAVLEY
分类号		主分类号
代理机构		代理人
主权项
地址

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