Improvements in or relating to diaphragm supports,申请号GB19290004826-传众专利搜索

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发明名称	Improvements in or relating to diaphragm supports
摘要
申请公布号	GB329278(A)	申请公布日期	1930.05.13
申请号	GB19290004826	申请日期	1929.02.13
申请人	MAURICE ERNEST ELLIOTT	发明人
分类号	H04R7/20	主分类号	H04R7/20
代理机构		代理人
主权项
地址

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