Elevating means for row markers,申请号US19480066157-传众专利搜索

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发明名称	Elevating means for row markers
摘要
申请公布号	US2657623(A)	申请公布日期	1953.11.03
申请号	US19480066157	申请日期	1948.12.20
申请人	ALLEN BENJAMIN H	发明人	ALLEN BENJAMIN H.
分类号	A01B69/02	主分类号	A01B69/02
代理机构		代理人
主权项
地址

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