Combined mine drill and breaker,申请号US19400372140-传众专利搜索

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发明名称	Combined mine drill and breaker
摘要
申请公布号	US2261017(A)	申请公布日期	1941.10.28
申请号	US19400372140	申请日期	1940.12.28
申请人	THE OHIO BRASS COMPANY	发明人	CHANDLER HOMER P.
分类号	E21C37/04	主分类号	E21C37/04
代理机构		代理人
主权项
地址

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