Means for extracting cores of soil from the ground,申请号US19480017756-传众专利搜索

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发明名称	Means for extracting cores of soil from the ground
摘要
申请公布号	US2615680(A)	申请公布日期	1952.10.28
申请号	US19480017756	申请日期	1948.03.29
申请人	WALTER KJELLMAN;EDMUND KALLSTENIUS TORSTEN KAR	发明人	KJELLMAN WALTER;KALLSTENIUS TORSTEN KARL EDMUND
分类号	E21B25/06	主分类号	E21B25/06
代理机构		代理人
主权项
地址

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