Highway crossing gate,申请号US19380246859-传众专利搜索

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发明名称	Highway crossing gate
摘要
申请公布号	US2310716(A)	申请公布日期	1943.02.09
申请号	US19380246859	申请日期	1938.12.20
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	STEPHENSON JAMES E.
分类号	B61L29/22	主分类号	B61L29/22
代理机构		代理人
主权项
地址

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