Coal cutting bit and holder therefor,申请号US19450601501-传众专利搜索

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发明名称	Coal cutting bit and holder therefor
摘要
申请公布号	US2449288(A)	申请公布日期	1948.09.14
申请号	US19450601501	申请日期	1945.06.25
申请人	FRANK PROX COMPANY, INC.	发明人	FULKE FRANK L.
分类号	E21C35/193	主分类号	E21C35/193
代理机构		代理人
主权项
地址

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