Screw feed and drive mechanism,申请号US19510204127-传众专利搜索

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发明名称	Screw feed and drive mechanism
摘要
申请公布号	US2657721(A)	申请公布日期	1953.11.03
申请号	US19510204127	申请日期	1951.01.03
申请人	KELLER TOOL COMPANY	发明人	SHAFF ERNEST H.
分类号	B25B23/04	主分类号	B25B23/04
代理机构		代理人
主权项
地址

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