Safety signaling means,申请号US19370170934-传众专利搜索

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发明名称	Safety signaling means
摘要
申请公布号	US2153277(A)	申请公布日期	1939.04.04
申请号	US19370170934	申请日期	1937.10.25
申请人	SHARP JOHN M	发明人	SHARP JOHN M.
分类号	E01F11/00	主分类号	E01F11/00
代理机构		代理人
主权项
地址

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