Controller for vacuum operated directional signals,申请号US19310513561-传众专利搜索

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发明名称	Controller for vacuum operated directional signals
摘要
申请公布号	US1928452(A)	申请公布日期	1933.09.26
申请号	US19310513561	申请日期	1931.02.05
申请人	THOMAS R. BROOKS	发明人	HAYWOOD JOHN W.
分类号	B60Q1/36	主分类号	B60Q1/36
代理机构		代理人
主权项
地址

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