Automatic crossing gate,申请号US19320610831-传众专利搜索

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发明名称	Automatic crossing gate
摘要
申请公布号	US1893824(A)	申请公布日期	1933.01.10
申请号	US19320610831	申请日期	1932.05.12
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	MCWHIRTER WILLIAM C.
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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