SEALED HOLE AND METHOD OF PRODUCING,申请号USD3522648-传众专利搜索

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发明名称	SEALED HOLE AND METHOD OF PRODUCING
摘要
申请公布号	US3522648(A)	申请公布日期	1970.08.04
申请号	USD3522648	申请日期	1968.11.29
申请人	CATERPILLAR TRACTOR CO.	发明人	WILLIAM B. WEBER
分类号	B21D39/03;F02B77/00;F02M59/44;(IPC1-7):B21D39/00;B23P11/02	主分类号	B21D39/03
代理机构		代理人
主权项
地址

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