Echo-ranging devices,申请号US19510220684-传众专利搜索

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发明名称	Echo-ranging devices
摘要
申请公布号	US2845513(A)	申请公布日期	1958.07.29
申请号	US19510220684	申请日期	1951.04.12
申请人	RAYTHEON MANUFACTURING COMPANY	发明人	FRYKLUND ROBERT A.
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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