Core breaker roller for rotary mining head,申请号US19600021545-传众专利搜索

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发明名称	Core breaker roller for rotary mining head
摘要
申请公布号	US3050292(A)	申请公布日期	1962.08.21
申请号	US19600021545	申请日期	1960.04.11
申请人	GOODMAN MANUFACTURING COMPANY	发明人	NEWTON JOHN S.;LUNDQUIST RICHARD C.
分类号	E21C27/22	主分类号	E21C27/22
代理机构		代理人
主权项
地址

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