Signaling installation for the protection of roads at level crossings,申请号US19290352811-传众专利搜索

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发明名称	Signaling installation for the protection of roads at level crossings
摘要
申请公布号	US1798302(A)	申请公布日期	1931.03.31
申请号	US19290352811	申请日期	1929.04.05
申请人	PIERRE BOUTHORS	发明人	BOUTHORS PIERRE
分类号	B61L29/26	主分类号	B61L29/26
代理机构		代理人
主权项
地址

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