Improvements in acoustic diaphragms and method of making the same,申请号GB19320011651-传众专利搜索

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发明名称	Improvements in acoustic diaphragms and method of making the same
摘要
申请公布号	GB403685(A)	申请公布日期	1933.12.22
申请号	GB19320011651	申请日期	1932.04.22
申请人	JESSE BARNUM HAWLEY	发明人
分类号	H04R7/14	主分类号	H04R7/14
代理机构		代理人
主权项
地址

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