Means for applying expansible collars,申请号US19390254026-传众专利搜索

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发明名称	Means for applying expansible collars
摘要
申请公布号	US2252692(A)	申请公布日期	1941.08.19
申请号	US19390254026	申请日期	1939.02.01
申请人	BETTIS RUBBER CO. LTD.	发明人	BARNES BYRON H.;MINOR BURT S.
分类号	E21B17/12	主分类号	E21B17/12
代理机构		代理人
主权项
地址

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