Drum movement indicator,申请号US19530385159-传众专利搜索

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发明名称	Drum movement indicator
摘要
申请公布号	US2776814(A)	申请公布日期	1957.01.08
申请号	US19530385159	申请日期	1953.10.09
申请人	SPARKS HUBERT A	发明人	SPARKS HUBERT A.
分类号	B66D1/00	主分类号	B66D1/00
代理机构		代理人
主权项
地址

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