Relay stepping bank,申请号US19530333757-传众专利搜索

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发明名称	Relay stepping bank
摘要
申请公布号	US2768334(A)	申请公布日期	1956.10.23
申请号	US19530333757	申请日期	1953.01.28
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	SANDE GEORGE VANDE
分类号	B61L7/08	主分类号	B61L7/08
代理机构		代理人
主权项
地址

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