Sound-ranging system,申请号US19230646304-传众专利搜索

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发明名称	Sound-ranging system
摘要
申请公布号	US1753346(A)	申请公布日期	1930.04.08
申请号	US19230646304	申请日期	1923.06.19
申请人	WESTERN ELECTRIC COMPANY, INCORPORATED	发明人	LUM GEORGE R.
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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