Slow down signal for automobiles,申请号US19470761357-传众专利搜索

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发明名称	Slow down signal for automobiles
摘要
申请公布号	US2442971(A)	申请公布日期	1948.06.08
申请号	US19470761357	申请日期	1947.07.16
申请人	CHESSROWN JAMES D	发明人	CHESSROWN JAMES D.
分类号	H01H21/26	主分类号	H01H21/26
代理机构		代理人
主权项
地址

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