Variable speed drive,申请号US19550531853-传众专利搜索

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发明名称	Variable speed drive
摘要
申请公布号	US2890924(A)	申请公布日期	1959.06.16
申请号	US19550531853	申请日期	1955.08.31
申请人	NORFOLK JR EDGAR A	发明人	JR. EDGAR A. NORFOLK,
分类号	G01S1/72	主分类号	G01S1/72
代理机构		代理人
主权项
地址

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