Train communicating apparatus for railways,申请号US19340706385-传众专利搜索

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发明名称	Train communicating apparatus for railways
摘要
申请公布号	US2011658(A)	申请公布日期	1935.08.20
申请号	US19340706385	申请日期	1934.01.12
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	SORENSEN ANDREW J.
分类号	B61L13/04	主分类号	B61L13/04
代理机构		代理人
主权项
地址

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