Radio echo ranging apparatus,申请号US19420438321-传众专利搜索

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发明名称	Radio echo ranging apparatus
摘要
申请公布号	US2660721(A)	申请公布日期	1953.11.24
申请号	US19420438321	申请日期	1942.04.09
申请人	PAGE ROBERT M	发明人	PAGE ROBERT M.
分类号	G01S1/02;G01S19/22;G01S19/24;H03H2/00	主分类号	G01S1/02
代理机构		代理人
主权项
地址

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