Variable pitch stepped screen,申请号US19530345282-传众专利搜索

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发明名称	Variable pitch stepped screen
摘要
申请公布号	US2703649(A)	申请公布日期	1955.03.08
申请号	US19530345282	申请日期	1953.03.30
申请人	NORDBERG MANUFACTURING COMPANY	发明人	CHEYETTE DAVID A.
分类号	B07B1/48	主分类号	B07B1/48
代理机构		代理人
主权项
地址

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