Counterbalanced spring for slidable windows,申请号US19470731340-传众专利搜索

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发明名称	Counterbalanced spring for slidable windows
摘要
申请公布号	US2505142(A)	申请公布日期	1950.04.25
申请号	US19470731340	申请日期	1947.02.27
申请人		发明人	ROTH FRED
分类号	E05D13/00;E05F1/16	主分类号	E05D13/00
代理机构		代理人
主权项
地址

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