Approach warning system,申请号US19490114181-传众专利搜索

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发明名称	Approach warning system
摘要
申请公布号	US2710341(A)	申请公布日期	1955.06.07
申请号	US19490114181	申请日期	1949.09.06
申请人	MOTOROLA, INC.	发明人	WINKLER MARION R.
分类号	B61L1/20	主分类号	B61L1/20
代理机构		代理人
主权项
地址

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