Improvements in and relating to sound emitting devices,申请号GB19310018156-传众专利搜索

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发明名称	Improvements in and relating to sound emitting devices
摘要
申请公布号	GB381579(A)	申请公布日期	1932.09.23
申请号	GB19310018156	申请日期	1931.06.23
申请人	JULIUS PINTSCH AKTIENGESELLSCHAFT	发明人
分类号	H04R1/30;H04R11/00	主分类号	H04R1/30
代理机构		代理人
主权项
地址

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