Improvements in or relating to apparatus for perforating sheet material,申请号GB19430008006-传众专利搜索

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发明名称	Improvements in or relating to apparatus for perforating sheet material
摘要
申请公布号	GB567432(A)	申请公布日期	1945.02.14
申请号	GB19430008006	申请日期	1943.05.20
申请人	E. I. DU PONT DE NEMOURS AND CO.	发明人
分类号	B26F1/20	主分类号	B26F1/20
代理机构		代理人
主权项
地址

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