Improvements in or relating to transducers,申请号GB19570024166-传众专利搜索

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发明名称	Improvements in or relating to transducers
摘要
申请公布号	GB873511(A)	申请公布日期	1961.07.26
申请号	GB19570024166	申请日期	1957.07.30
申请人	AMAR GOPAL BOSE	发明人
分类号	H04R1/22;H04R1/40	主分类号	H04R1/22
代理机构		代理人
主权项
地址

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