ELECTROACOUSTIC PHONIC TRANSDUCER,申请号PL19810229932-传众专利搜索

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发明名称	ELECTROACOUSTIC PHONIC TRANSDUCER
摘要
申请公布号	PL131698(B1)	申请公布日期	1984.12.31
申请号	PL19810229932	申请日期	1981.02.28
申请人		发明人
分类号	H04R;H04R1/42;H04R23/00;(IPC1-7):H04R23/00	主分类号	H04R
代理机构		代理人
主权项
地址

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