Blade protector device,申请号US19470780734-传众专利搜索

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法人/股东/高管

发明名称	Blade protector device
摘要
申请公布号	US2554780(A)	申请公布日期	1951.05.29
申请号	US19470780734	申请日期	1947.10.18
申请人	REED ROLLER BIT COMPANY	发明人	GOOLSBEE CHARLES C.
分类号	E21B10/42;E21B12/04	主分类号	E21B10/42
代理机构		代理人
主权项
地址

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