Railway crossing barrier,申请号US19330692326-传众专利搜索

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发明名称	Railway crossing barrier
摘要
申请公布号	US2023538(A)	申请公布日期	1935.12.10
申请号	US19330692326	申请日期	1933.10.05
申请人	ORR SAMUEL A;SUENDERHAUF OSCAR L	发明人	ORR SAMUEL A.;SUENDERHAUF OSCAR L.
分类号	B61L29/02	主分类号	B61L29/02
代理机构		代理人
主权项
地址

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