Door operating system,申请号US19510224738-传众专利搜索

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发明名称	Door operating system
摘要
申请公布号	US2782028(A)	申请公布日期	1957.02.19
申请号	US19510224738	申请日期	1951.05.05
申请人	THE MIDLAND STEEL PRODUCTS COMPANY	发明人	ALMOND JOHN R.
分类号	E05F15/02	主分类号	E05F15/02
代理机构		代理人
主权项
地址

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