Transducer and method of making the same,申请号US19510227497-传众专利搜索

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发明名称	Transducer and method of making the same
摘要
申请公布号	US2618698(A)	申请公布日期	1952.11.18
申请号	US19510227497	申请日期	1951.05.21
申请人	GENERAL ELECTRIC COMPANY	发明人	JANSSEN WILLIAM H.
分类号	H04R17/00	主分类号	H04R17/00
代理机构		代理人
主权项
地址

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