Sonic echo system,申请号US19510217648-传众专利搜索

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发明名称	Sonic echo system
摘要
申请公布号	US2973504(A)	申请公布日期	1961.02.28
申请号	US19510217648	申请日期	1951.03.26
申请人	BOBBER ROBERT J;DARNER CHARLES L	发明人	BOBBER ROBERT J.;DARNER CHARLES L.
分类号	G01S1/72	主分类号	G01S1/72
代理机构		代理人
主权项
地址

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