Improvements in and relating to means for directionally projecting sound,申请号GB19360014829-传众专利搜索

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发明名称	Improvements in and relating to means for directionally projecting sound
摘要
申请公布号	GB461106(A)	申请公布日期	1937.02.10
申请号	GB19360014829	申请日期	1936.05.26
申请人	OTTO KURT KOLB	发明人
分类号	H04R1/34	主分类号	H04R1/34
代理机构		代理人
主权项
地址

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