Sonic echo ranging,申请号US19540467311-传众专利搜索

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发明名称	Sonic echo ranging
摘要
申请公布号	US2721987(A)	申请公布日期	1955.10.25
申请号	US19540467311	申请日期	1954.11.08
申请人	RICHARD JR JOSEPH D	发明人	JR. JOSEPH D. RICHARD,
分类号	G01S15/96	主分类号	G01S15/96
代理机构		代理人
主权项
地址

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