Swivel,申请号US19270209542-传众专利搜索

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法人/股东/高管

发明名称	Swivel
摘要
申请公布号	US1746036(A)	申请公布日期	1930.02.04
申请号	US19270209542	申请日期	1927.07.30
申请人	GRAY TOOL COMPANY	发明人	GRAY ELLSWORTH
分类号	E21B21/02	主分类号	E21B21/02
代理机构		代理人
主权项
地址

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