Change speed mechanism for bicycles,申请号US19370119334-传众专利搜索

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发明名称	Change speed mechanism for bicycles
摘要
申请公布号	US2168322(A)	申请公布日期	1939.08.08
申请号	US19370119334	申请日期	1937.01.06
申请人	EDWARD BUTLER JAMES	发明人	BUTLER JAMES EDWARD
分类号	B62M9/04	主分类号	B62M9/04
代理机构		代理人
主权项
地址

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