PERMANENTLY-MAGNETIC BALL WITH MULTIPLE POLARITY DISTRIBUTED OVER ITS SURFACE,申请号USD3555475-传众专利搜索

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发明名称	PERMANENTLY-MAGNETIC BALL WITH MULTIPLE POLARITY DISTRIBUTED OVER ITS SURFACE
摘要
申请公布号	US3555475(A)	申请公布日期	1971.01.12
申请号	USD3555475	申请日期	1968.03.25
申请人	HARRY SZCZEPANSKI	发明人	HARRY SZCZEPANSKI
分类号	H01F7/02;(IPC1-7):H01F7/02	主分类号	H01F7/02
代理机构		代理人
主权项
地址

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