Door opening and closing device,申请号US19400330349-传众专利搜索

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发明名称	Door opening and closing device
摘要
申请公布号	US2319510(A)	申请公布日期	1943.05.18
申请号	US19400330349	申请日期	1940.04.18
申请人	THE YOUNGSTOWN STEEL DOOR COMPANY	发明人	MADLAND GABRIEL
分类号	E05B65/14	主分类号	E05B65/14
代理机构		代理人
主权项
地址

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