Power transmission system,申请号US19210454451-传众专利搜索

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发明名称	Power transmission system
摘要
申请公布号	US1808222(A)	申请公布日期	1931.06.02
申请号	US19210454451	申请日期	1921.03.22
申请人	HILD FREDERICK W	发明人	HILD FREDERICK W.
分类号	E21B19/08;F16H3/72	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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