Pressure ring for persons with defective hearing,申请号IT19880019801-传众专利搜索

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发明名称	Pressure ring for persons with defective hearing
摘要
申请公布号	IT1216112(B)	申请公布日期	1990.02.22
申请号	IT19880019801	申请日期	1988.03.16
申请人	FINNVEDEN HOLDING AB	发明人	TORE PALMAER;LEIF PALMAER
分类号	H04R;(IPC1-7):H04R/	主分类号	H04R
代理机构		代理人
主权项
地址

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