MINE ROOF GAUGE AND INDICATOR,申请号USD3594773-传众专利搜索

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发明名称	MINE ROOF GAUGE AND INDICATOR
摘要
申请公布号	US3594773(A)	申请公布日期	1971.07.20
申请号	USD3594773	申请日期	1968.11.12
申请人	ELLSWORTH V. CONKLE;CHARLES E. BEAR	发明人	ELLSWORTH V. CONKLE;CHARLES E. BEAR
分类号	E21D15/46;E21F17/18;(IPC1-7):G08B21/00	主分类号	E21D15/46
代理机构		代理人
主权项
地址

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