Auger head with odd number of arms,申请号US19660604670-传众专利搜索

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发明名称	Auger head with odd number of arms
摘要
申请公布号	US3414690(A)	申请公布日期	1968.12.03
申请号	US19660604670	申请日期	1966.12.27
申请人	PETERSEN ENGINEERING CO., INC.	发明人	PETERSEN GERALD A.
分类号	E21B10/44	主分类号	E21B10/44
代理机构		代理人
主权项
地址

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