Railroad crossing gate,申请号US19300444572-传众专利搜索

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发明名称	Railroad crossing gate
摘要
申请公布号	US1823596(A)	申请公布日期	1931.09.15
申请号	US19300444572	申请日期	1930.04.15
申请人	EDGAR M. CROUCH;HERMAN J. THORNE;D. E. LLOYD	发明人	FERGUSON WILLIAM T.
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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