Apparatus for the control of highway crossing signals,申请号US19300480890-传众专利搜索

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发明名称	Apparatus for the control of highway crossing signals
摘要
申请公布号	US1820170(A)	申请公布日期	1931.08.25
申请号	US19300480890	申请日期	1930.09.10
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	WILLARD PAUL F.;PFLASTERER GEORGE R.
分类号	B61L29/28	主分类号	B61L29/28
代理机构		代理人
主权项
地址

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