Method of making sound reproducing diaphragms,申请号US19320616552-传众专利搜索

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发明名称	Method of making sound reproducing diaphragms
摘要
申请公布号	US1989015(A)	申请公布日期	1935.01.22
申请号	US19320616552	申请日期	1932.06.10
申请人	PHILADELPHIA STORAGE BATTERY COMPANY	发明人	MCKELLIP SPENCER W.
分类号	H04R31/00	主分类号	H04R31/00
代理机构		代理人
主权项
地址

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