System of speed control,申请号US19330663487-传众专利搜索

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发明名称	System of speed control
摘要
申请公布号	US1971141(A)	申请公布日期	1934.08.21
申请号	US19330663487	申请日期	1933.03.30
申请人	ARNOLD HOIST KNUTE	发明人	HOIST KNUTE ARNOLD
分类号	H02P7/18	主分类号	H02P7/18
代理机构		代理人
主权项
地址

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