Back-off apparatus,申请号US19430481993-传众专利搜索

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发明名称	Back-off apparatus
摘要
申请公布号	US2379287(A)	申请公布日期	1945.06.26
申请号	US19430481993	申请日期	1943.04.06
申请人	EX-CELL-O CORPORATION	发明人	EGLESTON HARRY
分类号	B24B3/22	主分类号	B24B3/22
代理机构		代理人
主权项
地址

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