UN DISPOSITIVO DE CIERRE ESPONTANEO PARA POZOS DE VENTILACION O SALIDAS DE EMERGENCIA DE REFUGIOS, ESPECIALMENTE SUBTERRANEOS,申请号ES19920002726-传众专利搜索

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发明名称	UN DISPOSITIVO DE CIERRE ESPONTANEO PARA POZOS DE VENTILACION O SALIDAS DE EMERGENCIA DE REFUGIOS, ESPECIALMENTE SUBTERRANEOS
摘要
申请公布号	ES272692(A1)	申请公布日期	1962.04.01
申请号	ES19920002726	申请日期	1961.12.05
申请人	BOCHUMER EISENHUTTE HEINTZMANN & CO.	发明人
分类号	(IPC1-7):E21	主分类号	(IPC1-7):E21
代理机构		代理人
主权项
地址

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