Speed changing mechanism,申请号US19320589968-传众专利搜索

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发明名称	Speed changing mechanism
摘要
申请公布号	US2106733(A)	申请公布日期	1938.02.01
申请号	US19320589968	申请日期	1932.01.30
申请人	RADIO CORPORATION	发明人	GOLDSBOROUGH THADDEUS R.
分类号	G11B19/265	主分类号	G11B19/265
代理机构		代理人
主权项
地址

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