Welder's mask,申请号US19510212240-传众专利搜索

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发明名称	Welder's mask
摘要
申请公布号	US2801419(A)	申请公布日期	1957.08.06
申请号	US19510212240	申请日期	1951.02.23
申请人	TAPP TRUMAN D	发明人	TAPP TRUMAN D.
分类号	A61F9/06	主分类号	A61F9/06
代理机构		代理人
主权项
地址

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