Speed changing device for phonograph turntables,申请号US19310581694-传众专利搜索

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发明名称	Speed changing device for phonograph turntables
摘要
申请公布号	US2106722(A)	申请公布日期	1938.02.01
申请号	US19310581694	申请日期	1931.12.17
申请人	COLLISON EDWARD E;EMIL NYMAN	发明人	COLLISON EDWARD E.;NYMAN EMIL
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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