TRANSOPTOR-TYPE RELATIVE FREQUENCY DIFFERENCE TRANSDUCER,申请号PL19880270456-传众专利搜索

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发明名称	TRANSOPTOR-TYPE RELATIVE FREQUENCY DIFFERENCE TRANSDUCER
摘要
申请公布号	PL150112(B2)	申请公布日期	1990.04.30
申请号	PL19880270456	申请日期	1988.02.03
申请人		发明人
分类号	G01R;G01R23/00;(IPC1-7):G01R23/00	主分类号	G01R
代理机构		代理人
主权项
地址

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