Improvements in railroad crossings,申请号GB19360016574-传众专利搜索

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发明名称	Improvements in railroad crossings
摘要
申请公布号	GB467533(A)	申请公布日期	1937.06.18
申请号	GB19360016574	申请日期	1936.06.13
申请人	JEAN FRANCOIS EUGENE GRAND;RENE LUCIEN GRAND	发明人
分类号	E01B7/28	主分类号	E01B7/28
代理机构		代理人
主权项
地址

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