Variable speed drive,申请号US19400312087-传众专利搜索

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发明名称	Variable speed drive
摘要
申请公布号	US2297936(A)	申请公布日期	1942.10.06
申请号	US19400312087	申请日期	1940.01.02
申请人	BALLMAN EDWIN C	发明人	BALLMAN EDWIN C.
分类号	F16H9/12	主分类号	F16H9/12
代理机构		代理人
主权项
地址

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