Improvements in electroacoustic transducer,申请号GB19450000883-传众专利搜索

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发明名称	Improvements in electroacoustic transducer
摘要
申请公布号	GB637501(A)	申请公布日期	1950.05.24
申请号	GB19450000883	申请日期	1945.01.10
申请人	RAYTHEON MANUFACTURING COMPANY	发明人
分类号	G01S1/72	主分类号	G01S1/72
代理机构		代理人
主权项
地址

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