Master-control apparatus,申请号US19300424258-传众专利搜索

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发明名称	Master-control apparatus
摘要
申请公布号	US1780658(A)	申请公布日期	1930.11.04
申请号	US19300424258	申请日期	1930.01.29
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	SPRAY LESTER E.
分类号	B61L19/06	主分类号	B61L19/06
代理机构		代理人
主权项
地址

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